THE PERINEAL ARTERIES

(AFTER HENLE.) PUI, the Internal pudic; HE, the external hæmorrholdal; PE, the perioeal; SPO, the posterior scrotal; PN, the a, of the penis; RB, the a, of the bulb of the urethra; UR, the arteris urethral is; DP, the dorsal a, of the penis; PRS, the a, of the corpus caver no sum. —Peroneal a. Lat., arteria Madenbeinlpulwder. Sp., arteria per onéa. A branch of the posterior tibial a., which arises about an inch below the-lower border of the popliteeus muscle and descends along the inner border of the fibula to the lower end of the intero eous space, where it divides into the anterior and posterior peroneal arteries. It gives off branches to the muscles of the calf, the nutrient a. of the fibula, and a branch of communication with the posterior tibial a. [L, 142.] See also. Anterior peroneal a. and External calcaneal arteries.—Perpendicular a. A ve el which arises at right angles from the digital a of the hind leg of the horse and some other animals, and is distributed to the neighborhood of the fetlock. [L, TS eat ae a. A branch of the facial a. in some quadrupeds, analogous to the superior pharyngeal a. of man. [L,13.] See also ‘Ascending pharyngeal a. and Pterygo-palatine a.—Phrenic arteries. See Su erior phrenic a. and Inferior phrenic arteries. —Placental a. i name suggested by B. ige for the umbilical vein. [A, 79.—Plantar a. t., arteria plantar is, Ger., Fu ohlen der, À term applied to the posterior tibial a. on the sole of the foot, before it divides into the external and internal plantar arteries. fy 174.] See also Deep plantar a.—Plantar digital arteries. t, arterie digit a les plan tares. Fr., artéres digit a les plant a ires. ‘Ger., Sohlenzehenpulsadern. The branches of the plantar intero eous arteries which are distributed to the sides of the plantar aspect of the toes. They down to the distal phalanx, where they form an arch from the convexity of which small branches a to the extremity of the toe and to the matrix of the nail. [L, 142, 172.]—Plantar intero eous arteries, Plantar metatarsal arteries. Lat.,arteriæ intero eæ plan tares. Fr.,artéres intero euses plant a ires. Ger., Soh len mit tel fu puls a dern. Sp., arterias interôseas plan tares. Branches from the convexity of the plantar arch, which run downward in the intero eous spaces to the bases of the second phalanges, where they divide into the plantar digital arteries. They also give off the anterior and peters per for at in; arteries of the foot. [L, 142.]—Plantar-pollicar A branch oi elther the anterior tibial or the external plantar a., which runs downward in the first intero eous space and divides into the dorsal digital arteries of the great toe. [L, 179.]—Pollicar a. See Large a. of the thumb.—Popliteal a. Lat., arteria poplitæa. Fr., artère poplitée. Ger., Kniekehlpulsader. Sp., arteria poplitea, The mea, Fr.,artére péron ière. Ger., O, no; 07, not; O?, whole; Th, thin; Th, the; U?, like 00 in too; U?, blue; U%, lull; U*, full; U%, urn; US, like ü (German). continuation of the femoral a. which extends from the opening in the adductor magnus muscle to the lower border ef the popliteeus muscle, where it divides into the anterior and posterior tibial arteries. It lies deep in the popliteal space, being covered at its upper end by the semi mem bra nos us muscle, and lower ‘THE PLANTAR ARTERIES. (AFTER HENLE.) TP, the posterior tibial; PLM, the internal plantar; PLT, the external plantar; PLP, the deëp plantar; SPM, the artéria gupertcialis pedio medial is: DU, DC3, DCS, Det the plantur intero eous arteries; DV S, the arteria digit a lie plantar is propria lateral is quint i digii PFE, one of the posterior perforating arteries; PFA, one of tthe suterior perforating arteries. down by the gastrocnemius, the plantar is, and the upper part of the soleus. It furnishes muscular branches to the lower part of the muscles of the thigh, the superior and inferior, internal and external, and middie articular arteries of the knee, and the sural arteries. [L,142,|—Popliteal articular arteries. See Articular arteries of the knee.—Post cerebellar a. feaigen. See Posterior inferior cerebellar a.—Post cerebral a. [Wilder]. See.Posterior cerebral a.—Post chorioid arteries [Wilder]. See Posterior chorioid arteries.—Post communicant a. [Wilder]. See Posterior communicating a. of the brain.—Posterior abdominal a. Fr., artére abdominale postérieure. See Deep epigastric a.—Posterior and internal frontal arteries. Fr., artéres front a les en enicnnes et internes. Branches of the anterior cerebral a, ributed over the quadrate lobe. [L, pad BOteHor a. of the cavernous sinus (or of the receptacie). A branch given off from the internal carotid a. in the carotid canal, distributed to the posterior clinoid proce , the fourth, fifth, and sixth cranial nerves, and the dura mater In its vicinity. {L, 179.]—Posterior auricular a. Lat., arteria auricular is posterior. Fr., artère auricula ire postérieure. Ger., hintere Ohrarterie. Sp., arteria auricular posterior. A branch of the external carotid a. which runs upward under the eal gland to the groove between the cartilage of the ear and the mastoid proce of the temporal bone, where it divides into the auricular and mastoid branches. It also gives off the stylo-mastoid a, [L, 142.]|—Posterior cæcal a. A branch of the superior mesenteric distributed to the posterior surface of the cecum. [L, 179.)—Posterior cerebra i a. Lat., arteria cerebral is sterior.., artére cérébrale postérieure. Ger., hintere Gehirnj der. Sp., arteria cerebral posterior. One of the two terminal branches of the basilar a., which pa es upward from the upper border of the pons Varolii to the lower surface of the posterior part of the cerebrum. It gives off the posterior communicating and posterior chorioid arteries and branches to the occipital lobe and to the inner and lower parts of the temporo-sphenoidal lobe. [L, 142.] See also Vertebral a—Posterior cervicai a. Lat., arteria cervical is posterior. Fr., artére cervicale. Ger., hintere Nackenpulsader. 1. A branch of the transverse cervical a, which runs upward between the levator anguli scapulæ and splenius coll i muscles, to which it is principaliy distributed, and ends by anastomosing with the superficial cervical a. 2. See Deep cervical a.—Posterior chorioid arteries. Lat., arteriæ chorioideæ poster i ores. Ger., hintere Adernetzpulsadern. Branches of the posterior cerebral a. distributed to the upper portion of the chorioid plexus. [L, 142.)— Posterior ciliary arteries. Lat., arteriæ ciliares poster i ores. Fr., artéres ciliaires postérieures. Ger., hintere Blendungspulsadern. Sp., arterias ciliares poster i ores. Branches of the ophthalmic a. which ie forward, surrounding the optic nerve, to the sclerotic, which they pierce near the optic nerve, and divide in the chorioid coat into the long and short ciliary arteries. [L, 142.)— Posterior circumflex a. of the arm. Lat., arteria circumflex a humeri posterior. Fr.. artére circonflexe postérieure de Vhumérus. Ger., hintere Kranzarterie des Armes. A branch of the axiliary a. which arises just below the lower border of the subscapular is muscle and runs backward in company with the circumflex nerve through the space formed by the teres major muscle, the tendon of the long bead of the triceps, and the os brachii, It winds around the bone and terminates in the substance of the deitoid muscle. giving off branches to the structures in its neighborhood. [L, 142. —Posterior circumflex a. of the shoulder. See Prehumera a—Posterior cireumflex a. of the thigh. See Internal circumflex a. of the thigh.—Posterior colic a. Fr., artère colique stérieure. Ana. which runs along the free margin of the colon in the horse, [L, 158.|—Posterior communicating a. of the brain. Lat., arteria com muni cans posterior, Fr., artère communicante postérieure, Ger., hintere Verb in dungs puts a der. A short ve el connecting the terior cerebral and internal carotid arteries on each side. [L.] Cf. Crrciz of Will is.—Posterior cubital recurrent a. See Posterior ulnar recurrent a.—Posterior dental a. Lat., arteria dental is posterior. Fr., artére dentaire postérieure. Ger., hintere Zahnpulsader. A branch of the sphenomaxillary portion of the internal maxillary a., distributed to the molar and bicuspid teeth and the mucous membrane of the maxillary sinus. [L, 142.|—Posterior dorsa i a. of the penis. An analo; of the dorsal a. of the penis of man, in some quadrupeds. {L, 1 Posterior dor so-intero eous a. of the arm. See Posterior intero eous a. of the arm.—Posterior ethmoidal a. Lat., arteria ethmoidal is posterior. Fr., artère ethmoïdale postérieure. Ger., hintere Riechbeinpulsader. Ges arteria etmoidal fees A branch of the ophthalmic a., which pa es through ‘he internal orbital canal and is distributed to the mucous membrane of the posterior ethmoidal cells and of the upper part of the nose. _ [L, 142.j—Posterior iliac a. See Gluteal a.—Posterior inferior cerebellar a. Lat., arteria cerebelli inferior posterior. Fr., artère cérébelle use inférieure posterieure. r. hintere und untere Hirnleinpulsader. A branch either of the vertebral or of the basilar artery, which arises near the pons Varolii and runs ward and outward to the forepart of the vallecula, where it divides into two branches, which are distributed to the lower and back portion of the cerebellum, [L, 142.]—Posterior internal optic a. Fr., artère optique interne postérieure A branch of the terior communicating a. of the brain, or of the posterior cereral a., which is distributed to the optic thalmus. bis Dvret, l c. (L).]-Posterior intero eous a. of the forearm. Lat., arteria intero ea antibrachti posterior. Fr., artére intero euse postérieure de Vavant-bras. Ger., hintere Zwischenknochenpulsader. A branch of the common intero eous a. of the forearm, which pa es to the posterior surface of the forearm through the interval between the oblique ligament and the upper border of the intero eous membrane. It runs downward between the superficial and deep extensor muscles and ends near the wrist by anastomosing with the rete carpeum dorsale. It gives off the posterior intero eous recurrent a. and numerous ranches to the muscles of the back of the forearm.—Posterior intero eous recurrent a. of the arm. See Posterior radial recurrent a.—Posterior mediastinal arteries. Lat., arteriæ medias tinæ poster i ores. Fr., artéres médiastinées postérieures. Ger., hintere Mittel, clipulenten Branches of the thoracic aorta distributed to the g] and areolar ti ue of the posterior mediastinum. [L, 172.)—Posterior meningeal a. Lat., arteria me- _ ningea posterior. Fr., artére méningée postérieure. Ger., hintere Hirnhautpulsader. Sp., arteria meningea posterior. 1. A branch of the vertebral a, given off Tet the foramen magnum, distributed to the dura mater of the lower occipital fo a and to the faix cerebelli. {L, 142.] 2. A branch of the inferior pharyngeal a. distributed to the dura mater. [L.]—Posterior metacarpal intero eous arteries. Two branches, in some quadrupeds, of the radio-palmar a., distributed to the lateral and posterior portions of the métacarpus. [L, 18.]—Posterior palatine a. See Superior palatine a.—Posterior] parietal a. Fr., artère par iétale postérieure. A branch of the middie cerebral a. distributed to the inferior parietal and the first temporal convoiutions. [H. Duret, le, (L).]—Posterior perforating arteries of the foot. Lat., arteriæ per for antes poster i ores. Three branches of the plantar arch which pa backward through the back part of the three outer intero eous spaces to inosculate with the dorsal intero eous arteries of the foot. [L, 142,.]—Posterior peroneal arteries. Fr., artéres péron ières postérieures. Sp.,arterias perôneas poster i ores. See External calcaneal arteries.—Posterior radial carpal a. See Posterior radio-carpal a.—Posterior radial reeurrent a. Lat., arteria radial is recurrens posterior. Fr., artére récurrente radiale postérieure. Sp., arteria recur rente radial posterior. A branch of the posterior intero eous a. of the forearm, which pa es up beneath the anconæus muscie to the interval between the olecranon and the external condyle, and terminates by anastomosing with the superior pro fund a and posterior ulnar recurrent areriost [L, 142.]—Posterior radio-carpal a. Lat., arteria carpea dorsal is radial is, Fr., artère dorsale du carpe, A branch of the radial a., which runs transversely acro the back of the carpus and, uniting with a similar branch of the ulnar a., a ists in forming the rete carpeum dorsale. (L, 7.) —Posterior scapular a. Lat., arteria dorsal is scapulæ, Fr., artere scapula ire postérieure. Ger., Ruckenschlagader des Schulterblatts. Sp., arteria escapular posterior. A branch of either the transverse cervical or the subclavian a., which runs kward to the wanes angle of the scapula, where it turns and a es downward to the inferior angle of the bone. Close to the u rangle of the scapula it gives off the supra spinous a., and during its course numerous branches to the adjoining muscles. [L, 142. —Posterior scrotal arteries. Lat., arteria scrota les _ poster i ores. Fr., artéres scrota les postérieures. Branches of the internal pudic a. distributed to the posterior portion of the scrotum. [L, 3i.]— Posterior spinal a. Lat., arteria_spinal is posterior. Fr., artère spinale postérieure. Ger., hintere ckenmarkspulsader. Sp., arteria spinal posterior, A branch of the vertebral a., given off at the side of the medulla oblong ate. which descends hind the posterior roots of the spinal nerves as far as the cauda equina., It is distributed to the contents of the spinal canal and receives branches through the intervertebral foramina from the intercostal and lumbar arteries. [L, 172.)—Posterior temporal a. Lat., arteria temporal is sterior. Fr., artère emporale térieure. 1. À branch of the superficial temporal a., which runs upward upon the temporal fascia and is distributed to the side of the head and to the vertex. [L, 142.) 2. A branch of the posterior cerebral a. distributed to the hippocampal convolution, the third temporal convolution, and the lobulus fusiform is, terminating at the inferior occipitotemporal sulcus. {H. Duret, /. c. (L); J, 189.] —Posterior tibial a. Lat., arteria tibial is terior, Fr., artére tiiale postérieure. Ger., hintere Schienbeinpulsader. Sp., arteria tibial ‘ posterior. The larger of the two terminal branches of the popliteal a., which extends from the lower border of the poplitæus muscle to the lower border of the internal annular ligament of the ankle, where it divides into the external and internal plantar arteries. It gives off numerous unuamed branches to the integument and muscles of the posterior portion of the calf, the nutrient a. of the tibia, and the peroneal and internal malleolar = Za pnt œ " u / A / CAM SG fin Geb POSTERIOR TIBIAL ARTERY. (AFTER HENLE.) PO, the popliteal; TA, the anterior tibial; TZ, the rior tibial; PC,’ the eronesl; RTA, the anterior rent; KTP, the rior tiblal recurrent; uperior fibular; NUF, the nutrient a. of the 7, the nulrient n. of the tibia; PPF, the anterjor peroneal; COM, the ‘arteria anastomotic a tran vers a; MA, the arteria malleolar is anterior medial is; MAL, the Infernal malleolar; MPM, the arteria malleolar is ‘posterior medial is; C4M, the middle calcaneal; PLM, the internal plantar; PLZ, the external plantar. Whip ä arteries. [L,142.]—Postérior tibial recurrent a. Lat., arteria tibial is recurrens posterior. Fr., artère tibiale récurrente postérieure. Ger., hintere zuriicklaufende Schienbeinpulsader. A branch of the anterior tibial a., which runs up beneath the popliteeus muscle to the back of the knee joint where it anastomoses with the inferior articular arteries of the knee. [L, 13, 142.|—Posterior ulnar carpal a. See Posterior ulno-carpal a.— Posterior ulnar recurrent a. Lat., arteria recurrens wlnaris posterior. Fr., artère récurrente cubitale postérieure, Ger., hintere zurücklaufende Ellenbogenpulsader. A branch of the upper part of the ulnar a., sometimes arising with the anterior recurrent from a common trunk, which runs upward and backward beneath the flexor sublimis muscle to the inner condyle of the os brachii. It gives off branches to the ulnar nerve, the elbow joint, and the muscles in its vicinity, and anastomoses with the inferior pro fund a, anastomotic, and posterior radial recurrent arteries. [L, 142.|—Poster lor ulnocarpala. Lat., arteria carpea dorsal is ulnar is. Fr., artére dorsale du carpe. A branch of the ulnar a., which pa es acro the dorsal surface of the carpus and, uniting with a similar branch of the radial a., a ists in forming the rete carpeum dorsale. [L, A.J— Poster lor vertebral arteries. See Primitive AORrx—Præcipua mes enter i cum accedens a. See Superior mesenteric a. —Pre cerebellar a. {veilaeny, See Superior cerebellar a—Pre cerebral a. [Wilder]. See Anterior cerebral a.—Pre chorioid arteries [Wilder]. See Anterior chorioid arteries—Pre communicant a, [Wilder]. See Anterior communicating a. of the brain. —Pre humeral a. A branch of the brachial a. of some quadrujel which pa es down between the two heads of the coracohumeralis muscle and terminates in the substance of the mas to i do humeral muscle. It supplies the shoulder joint and the adjacent muscles. {L, 13.|—Pre plantar a., Pre plantar ungual a. One of the terminal branches of the digital a. of the horse and some other animals, which pa es down through the pre lantar fi ure and is distributed to the bulb of the heel and to the villous and laminal ti ues of the foot. [L, 13.]—Prepubie a. A branch, in the solipeds, of the external iliac-or femoral a., which pa es through the crural ring and divides into two branches, which are the analogues of the superficial epigastric, the epigastric, and the external pudic arteries of man. [L, 13.]—Pre vertebral a. Fr., artère prévertébrale. A branch, in some quadrupeds, of the occipital a., which is distributed to the meninges and to the rotator muscles of the head. [L, 13.] See also Posterior meningeal a.— Primary iliac a. See Common iliac a—Primitive a. Primitive aonta.—Primitive carotid a. See Common carotid a.—Primltive iliac a. See Common iliac a.—Pro fund a a. of. the clitoris. See Cavernous a. of the clitoris —Pro fund a a. of the thigh. See Deep femoral a.—Pro fund a femoris a. See Deep femoral a.—Pro fund a penis a. See A. of the corpus caver no sum,—Pro fund a radial a. Lat., arteria collateral is radial is inferior. Fr., artére coll atérale externe. The termination of the superior pro fund a a, of the arm at the back of the elbow. [L, 1796.|—Pro fund a tibial a. of the foot. The innermost branch of the internal plantar a., which runs down on the border of the abductor pollicis muscle and unites with the plantar pollicar a, [L, 179.|—Pterygo-palatine a. Lat., arteria pterygo-pal at in a. Fr., artere ptérygo-palatine. Ger., Fliigelpulsader. A branch of the spheno-maxillary a., which pa es through the ptery; palatine canal, and is distributed to the Eustachian tube and the upper part of ‘the pharynx, [L, 172.]—Pudic arteries. See Acce ory pudic, Inferior external pudic, Internal pudic, Middle external pudic, and Superior external pudic a.—Pulmonary a. Lat., arteria pul monal is. Fr., artére pulmonaire. Ger., Lungenarterie. Sp.,arteria pulmonal. The ve el which arises from the left side of the base of the right ventricle of the heart and terminates by dividing into the right and left pulmonary arteries close to the lower side of the arch of the aorta. The right a. runs outward behind the ascending aorta and the superior vena cava to the root of the lung, where it divides into two branches. The left a. pa es in front of the descending aorta and the left bronchus, where it also divides into two branches. They divide into branches which accompany the bronchial tubes and terminate in the pulmonary capillaries, [L, 172.]—Pylorle a, Lat., arteria pyloric a, Fr., artère pylori que. 8p. arieria pilérica. 1. A branch of the hepatic a, at ich reaches the stomach at the pylorus and runs from right to left, along the smaller curvature, to anastomose with the coronary a. of the stomach. 2. A branch of the gastro-duodenal a, distributed to the pylorus. {L, 172.] Radial a. Lat., arteria radial is. Fr, artére radiale. Ger., Speichenpulsader. Sp., arteria radial. The smaller of the two terminal branches of the brachial a. It commences at a point opnasitel the neck of the radius, and runs along the outer part of the forearm to the styloid. proce of the radius, where it turns around the outer border of the wrist to the upper border of the space between the met: 1 bones of the thumb and index finger, and pa es into the im of the hand, terminating in the deep palmar arch. Its position in the forearm is indicated by a line extending between the middle of the bend of the elbow and the space between the scaphoid bone and the extensor tendons of the thumb, _It gives off the anterior radial recurrent, anterior radio-carpal, superficial volar, terior radio-carpal, and first dorsal intero eous arteries, the dorsal arteries of the thumb and index finger, the large a. of the thumb, and the arteria radial is indicis. [L, 142, 172.)—Radial recurrent a. Lat., arteria radial is recurrens, Yr., artére radiale récurrente. A term applied to the anterior and posterior radial recurrent arteries. but more properly restricted to the former, [L.]—Radial is indicis a. Lat., arteria radial is indicis. Fr., artère radio-dorsale de Vindex. A branch of the radial a., which descends between the abductor indicis and the adductor pollicis muscles, and runs along the radial side of the index finger to its extremity. ' [L, 172.]—Radio-carpal transverse palmar a. See Anterior radio-carpal a.—Radio palmar a. Lat., arteria radio-palmar is, Fr., artére radio-palmaire. See Superficial volar a.—Ranine a. Lat., arteria ranina. Fr., artère ranine. Ger., Seitenzungenarterie. The continuation O, no; O?, not; O3, whole; Th, thin; Th?, the; U, like 00 in too; U?, blue; U%, lull; U*, full; U5, urn; US, like ü (German), of the lingual a., which pa es forward from the lower surtace of the tongue to its tip, where it anastomoses with its fellow, forming a small loop. In the last part of its course it lies close to the frænum and may be wounded in the operation for tongue-tie. It is distributed to the substance of the tongue. {L, 172,]—Renal a. Lat., arteria renatis. Fr., artère rénale. Ger., Nierenpulsader. A branch of the abdominal aorta, which arises a little below the superior mesenteric a., that of the left side eeorapely a little the lower. Itruns at nearly a right angle to the hilum ot the kidney, where it divides into several branches distributed to the substance of that organ. It also gives off the inferior suprarenal and the superior ureteric arteries. [L, 31, 142.]—Retinal arteries. See Central retinal a., ARTERLE nasates ret inæ super i ores and infer i ores, ARTERIÆ tempo rales ret inæ super i ores and infer i ores, AR- TERIÆ macula res ret inæ super i ores and infer i ores, and ARTERIA median a retine.—Retrograde colic a. A term applied, in some quadrupeds, to a branch of the superior mesenteric a., which runs along the colon in a direction opposite to that taken by the food, and anastomoses with the direct colic a. {L, 13,|—Retrograde occipltal a. See Atloido-muscular a—Rhachidian arteries. See ARTERLH spinales.—Right bronchial a. Lat., arteria bronchial is dextra. Fr., artère bronchi que droite. The ve el which is distributed to the ti ue of the right lung. It arises from the first aortic intercostal a. or, by a common trunk with the upper left bronchial, from the thoracic aorta, [L, 142.|—Right cardiac a. See Right coronary a. of the heart.—Right colic a. Lat., arteria colic a dextra. Fr., artère calique droite. Ger., rechte Dickdarmuisader. A branch of the mae mesenteric a., which runs fransverse! acro to the right side, lying beneath the peritoneum, to the middle of the ascending colon, where it divides into two branches, one of which communicates with the ileo-colic and the other with the middle colic a. [L, 142.] See also Direct colic a.— Right coronary a. of the heart. Lat., arteria coronaria cord is dextra. Fr., artère coronaire droite du cœur. An a. arising from the anterior sinus of Valsalva, which runs forward between the pulmonary a. and the right auricular appendix to the right auriculo-ventricular groove, which it follows fora certain distance and then divides into two branches, one of which runs in the left auriculo-ventricular groove and the other in the posterior interventricular groove. [L, 142.)—Right coronary a. of the stomach, See Pylaric a.—Right gastric a., Right gastro-epIploic a Lat., arteria gastro-epiploic a dextra. Fr., artére gastro-épiploïque droite. Ger., rechte Magennetzpulsader. Sp.. arteria gastro-epiplôica derecha. The continuation of the gastro-duodenal a., which runs from right to left along the great curvature of the stomach, between the layers of the great omentum, and anastomoses with the left gastro-epiploic a. 31,J—Right hepatic a. Lat., arteria hepatica dextra. Fr., artère hepatique droite. Ger., rechte Leberarterie. A branch of the hepatic a., which runs outward to the transverse fi ure, where it divides into several small branches distributed to the substance of the liver. It also gives off the cystic a. [L, 142,)—Right subclavian a. A term sometimes applied to the innominate a. (L.|—Right superior duodenal a. See Superior pancreatico-duodenal a.—Sacral arteries. See Middle sacral a, and Lateral sacral arteries—Sacra media a. See Middle sacral a.—Sacro-lateral arteries. See Lateral sacral arteries. —Sacro-median a. See Middle sacral a—Saphena a. Ana. arising at an acute angle from the femoral a. of the horse and some other quadrupeds, which runs down the leg in company with the saphenous vein, and is distributed to the hollow of the hock and the anterior surface of the lower third of the leg. [L, 13.]—Seapular arteries. See Clavicular a., Subscapular a., Acromial a., Posterior scapular a., Circumflex a. of the scapula, and Supra scapular a.—Scapular cireumflex à See Circumflex a. of the scapula.—Seapulo-humeral a. See Posterior circumflex a. of the arm.—Sciatic a. Lat., arteria ischiadic a. The larger of the two terminal branches of the internal iliac a., which descends upon the anterior surface of the pyriform is muscle and_the sacral plexus to the lower part of the great sacro-sciatic foramen, where it pa es out of the pelvis in company with the internal pudic a, and the sciatic nerve. It then turns downward beneath the gluteeus maximus muscle and ends in a small branch distributed to the integument of the back of the thigh. It gives off the comes nervi ischiadic i a, and branches to the coccyx and to the parts it traverses.—-Scrotal arteries. See Antcrior scrotal a. and Posterior scrotal arteries.—S Se ab Toe. of the thigh. Lat., arteria perforans secund a. Fr., artère per for ante seconde de la cui e. r., zweite durchbohrende Pulsader. A branch of the deep femoral a., given off a little below the lower border of the pectinæus muscle, sometimes in common with the first perforating vhich et the adductor magnus and long us muscles, and is d the muscles of the posterior aspect of the thigh. buted {L, 142.}— Short ciliary arteries. Lat., arterie ciliares breves. Fr., artères ciliaires courtes. Ger., kurze Blendungspulsad Sp.. arterias ciliares cortes. Branches of the posterior ciliary arteries distributed to the chorioid coat of the eye. [L, 31.]—Short thoracic a. See Superior thoracic a.—Sigmoid a. Lat., arteria_ sigmoidea, Fr., artère colique gauche inférieure. A branch of the inferior mesenteric a., which runs down to the sigmoid flexure of the colon, where it divides into brauches which are distributed to the colon, and anastomoses with the left colic and superior hæmorrhoidal arteries. [L, 142.)—Small external iliac a. See External circumflex iliac a—Small meningeal a. Lat., arteria meningea parva. Fr., artère méningée petite. Ger., kleine Hirnhautpulsader. A brauch of elther the middle meningeal or the internal maxillary a,, which enters the cranium through the foramen ovale and is distributed to the Ga er i an ganglion and the dura mater of the middle fo a of the skull. {L, 7.j—Small mesenteric a. A term applied, in some quadruned to a branch of the abdominal aorta distributed to the lower portion of the colon and the rectum. [L, 18.]—Small saphenous a. An occasional branch of the popliteal a.. which runs down to the external malleolus, to the neighborhood of which it is distributed. [L, 142.]—Small testicular a. See External spermatic a.—Spermatic a. Fr. artére sperm at i que. A term applied to the external and internal spermatic arteries, but more paoperly restricted to the latter. [L. —Sphenoidal a. A branch of the middle cerebral a. distribute to the lower portion of the cortex of the sphenoidal lobe. [L, 189.] —Spheno-palatine a. Lat., arteria spheno-pal at in a. Fr., ar fere sphéno-patatine. Ger,, Keilbeingaumenpulsader. A small ranc! of the internal maxillagy a.. which pa es through the Splencymaladne foramen and is distributed to the ethmoidal cells, the antrum, and the frontal sinus. [L, 142.|—Spheno-spinous a. Lat., arteria spheno-spinosa. ¥r., artère sphéno-épinense. See Middle meningeal a.—Spinal arteries. See Knrenie spinales—Spiral arterie: See Utera-placental arteries.—Splenic a. Lat., arteria splenic a. Fr., artère splénique. Ger., Milzpulsader. Sp. arteria esplénica. The largest branch of the coeliac a., which runs along the upper border of the pancreas and divides into branches distributed to the stomach and the spleen. It gives off the arteria pancreatic a magna and the left gastro-epiploic a, {L, 31, 172.]—Splenico-pancreatic arteries. Branches of the splenic a. distributed to the spleen. {L, 179. } See Posterior palatine a.—Sternal a,, artére sternale. 1. An a., in certain of the crustaceans, which pa es down at right angles. to the heart to the sternum, where it divides into two branches, which run beneath and penaet to the nervous cord. {L, 158.] 2. In the pl., the branches of the internal mammary a. distributed to the sternum and the triangular is stern i muscle. [L, 7. mastoid arteries. Lat., arteriæ sterno-mastaideæ. Fr.. artéres sterno-mas toïdiennes. A term applied to branches of the external carotid, occipital, and superior thyreoid arteries distributed to the Sterno-