THE EXTERNAL SURFACE OF THE MALAR BONE

(AFTER SAPPEY.) 1, the external orifice of the malar canal; 6, the frontal proce ; 8, the anterior angle; 7, the Inferior angle; 9, the temporal proce , © P Zwischenkiemendeckelstück, Ab. in the gill-cover of fishes which lies in front of and below the opercular b., with which it articulates, and is connected at its opposite extremity by ligament with the angular b. and the hyoid apparatus. [L, 200, 207.]—Interorbital b. An inconstant o ification in certain fishes, lyi between the fore part of the pre sphenoid and the orbito-sphenoid b’s. (L, 14.|—Interparletal b. Lat., 0s interparietale. Fr., os inter par iétal. 1. In the human fœtus, the tabular portion of the occipital b., which sometimes persists through life asa distinct b. [L, 14, re Cf. B. of the Incas, 2. In some of the lower vertebrates, a b, ly! De bee the front edge of the supra-occipital b. and the arietal b's. [L, 149.] -3. Of Aga iz, see Supra-occipital b.— nterspinous b’s. Fr., 0s interépineux. A number of dagger shaped b's in certain fishes, which are connected by ligaments to the spinous proce es of the vertebree and extend upward in the median line to articulate with the rays of the median fins. [L, 12.] —Intestinal b. Ger., Darmbein. See IL1um.—Investing. See Membrane 6's.—Irregular. Lat., o a multiform i a. Fr., os mixtes. Ger., gemischte Knochen. Those b’s which are of such irregular shape that they can not be cla ed as long, short, or flat b's. [L 172.]-Jugal b. Lat., os jugale. Fr., os jugal. Ger. Jochbein. 1. Of Cuvier, the malar b. (in mammals, crocodiles, and lizards), the squamosal b. (in birds and monotremes), and the quadrate b. (In fishes and batrachians). 2. Of Ae see Lacrymalb. 3. Of G. St.-Hilaire, the infra-orbital b. [L, 14.]Jugnlar b., Key See CLAVICLE.—Knuckle b. The coccyx. [A, 43.] Labiai ». Ger., Lippen be in. The labial cartilages of fishes when they become o ified, [L, 14.]—Laerymal b. Lat.,os unguis. Fr., ©s lacrymal. Ger., Thränenbein (1st def.). Syns.: jugal b. Aga iz}, adorbital b. (1st def.) [G. St.-Hilaire]. 1. A thin scale of b. which is situated at the anterior and inner part of the emit articulating with the frontal and ethmold b’s and the superior maxilla. [L 14, 153.] 2. Of G. St.-Hilaire, the prefrontal b._[L, 14.]|—Lambdoid b. [Broca|: See up ternanietal b. (ist def.).—Large cunelform b. Of Percivall, the scaphoid b. of the tarsus of the solipeds. [L, 13,]—Lateral ethmoid b. [Parker]. See Prefrontal b,—Lateral occipital b. 1. Of Aga iz and Cuvier, the exoccipital b. [L, 14.] 2. Of G. St.-Hilaire, the epiotic b. in fishes. [L, 14.]—Lenticular b. See Orbicular b.— Le er lacrymal b. The hook-like pres of the lacrymal b., which articulates with the superior maxilla, when it remains throughout life ununited with the lacrymal b. (L, 172.|—Lid. See Membrane b’s—Ligament. See Sesamoid b’s.—Lingual b. Lat.,