. On the anatomy of vertebrates [electronic resource] . ischia, and accordingly reachthe urethral bulb by very long ducts. The penisis long and bent when at rest. There are two6levatores which rise from the ischial tuberosi- Spermatozoa, A, of the Rat;of the Mouse : magn. cccvi, 513 ties behind the c erectores alono; the Spermatozoa, Squirrel :magn. cccvi. receptacles inthe rut; but passing sides of the penis, their tendons meet upon the( dorsum near the reflection of the long prepuce,crossing the e vena dorsalis and inserted into thec ossiculum glandis: the urethra opens upon aspecial process
. On the anatomy of vertebrates [electronic resource] . ischia, and accordingly reachthe urethral bulb by very long ducts. The penisis long and bent when at rest. There are two6levatores which rise from the ischial tuberosi- Spermatozoa, A, of the Rat;of the Mouse : magn. cccvi, 513 ties behind the c erectores alono; the Spermatozoa, Squirrel :magn. cccvi. receptacles inthe rut; but passing sides of the penis, their tendons meet upon the( dorsum near the reflection of the long prepuce,crossing the e vena dorsalis and inserted into thec ossiculum glandis: the urethra opens upon aspecial process which projects beyond the mainbody of the glans. In the Shrews, temporarythe perineum receive the enlarged testes duringdo not project, as a scrotum. The epididymis MALE ORGANS OF CETACEA. 657 extends round two-thirds the circumference of the testis. Theterminal half of the sperm-duct is dilated, like a uterine horn. In a proboscis-shrew (Rhyncliocyon) the testes, fig. 515, t, havea long epididymis, e, terminating in the usual convoluted vas 514 515. A portion of a tubule of the testis, Guinea-pig, with sperm-cellsand spermatozoa, ccxc. Magnified 30O diameters. deferens, d: large conglomerate vesicularand prostatic glands, p, p, extend alongthe upper half of the elongate muscularpart of the urethra : a pair of small Cow-perian glands, e, e, open into the bulbouspart: this is grasped by a strong i acce-lerator, b, b. Above the f crura corporiscavernosi1 are the (levatores penis, k, glans is nearly half the length of thepenis ; its termination is suddenly attenu-ated, with a crenate border and a fila-mentary appendage: there is no ossiclein this or other shrews. In the Bats the prepuce is relativelylonger in its freely projecting part than inMoles and Shrews, and the penis is pen-dulous. The glans offers odd modificationsin some species: a lateral pair of promi-nences extend its upper surface in Ves-per tilio serotinus, the lower surface beingcarinate and produced into a h
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