Synaptera (sin apter a)

pl. [NL., syn apterous (si-nap'te-rus), a. Pertaining to the Synaptera, or having their characters. synapticula (sin-ap-tik'ū-lä), n.; pl. synapticu læ (-lē). [NL., IMG:content-2693.jpg:[blocks in formation] IMG:content-2694.jpg:[ocr errors] IMG:content-2695.jpg:[blocks in formation] Synapta digit at a , adult, longitudi nal section of anterior end of body, magnified. a, perisoma; 6, b, cir cum esophageal calcareous plates; c, tentacular canal; d, esophagus; e, radiating pharyngeal muscles; g, divided ends of circumoral nerve; h, circular ambulacral ve el with Polian vesicle; 1, holothurians, typified by the genus Synapta. They have five ambulacral canals, a polar mouth and anus, and no Cuvierian organs, no water. lungs, and no pedicels. Locomotion is effected by the peculiar spicules or hard calcareous bodies in the integument, of various shapes, as plates,, oral disk. wheels, and anchors. cavity of a longitudinally divided ten tacle, into a tentacular canal opens; &, generative cæca; 2, mesentery with with the dorsal blood-ve el; m, so-called auditory vesicle on the radial nerve; ", ", longitudinal per i somatic muscles; o, tentacular pedicels; There are several genera besides Synapta, as Chiro dot a, My rio trochus, Oligotrochus, and Anapta. They are fragile marine organisms, vermiform, and so transparent or with be Buch thin and colorle skin that the internal organs may Synaptomys (si-nap'tō-mis), n. [NL. (S. F. Baird, 1857), true lemmings of the genus Myodes, while the external characters are those of Arvicola proper. There is only Lemming-vole ( Synaptomys cooper i). one species, S. cooper i, a rare and little-known animal inhabiting North America from Indiana, Illinois, and Kansas to Alaska, about 4 inches long, much resembling the common American meadow-mouse ( Arvicola riparius ). Synaptosauria (si-nap-to-sari-ä), n. pl. [NL., synaptychus (si-nap'ti-kus), n. [NL., synarchy (sin'är-ki), n.; pl. synarchies (-kiz). [ The synarchies or joint reigns of father and son. Stack house, Hist. Bible. IMG:content-2696.jpg:[blocks in formation] chidæ, Symbranchus.