. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 394- RODENTIA. likewise the terminations of the two vasa defe- rentia. In the lagomys (Lepus pusillus, ogotonus, and alpinus, Pall.) the vesiculae seminales are double and separate. In the common squirrel each seminal vesicle consists of a short canal folded upon itself. This approximates its fellow on the opposite side between the prostate and the canal of the urethra ; and, contrary to what is usual in this order, internal to the vasa deferentia. The prostate glands. — The name of pro- state gland is restricted by Cuvi
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 394- RODENTIA. likewise the terminations of the two vasa defe- rentia. In the lagomys (Lepus pusillus, ogotonus, and alpinus, Pall.) the vesiculae seminales are double and separate. In the common squirrel each seminal vesicle consists of a short canal folded upon itself. This approximates its fellow on the opposite side between the prostate and the canal of the urethra ; and, contrary to what is usual in this order, internal to the vasa deferentia. The prostate glands. — The name of pro- state gland is restricted by Cuvier to those glandular masses of analogous structure to the human prostate, the excretory canals of which open by one or several orifices into the com- mencement of the muscular portion of the urethra, or into the first portion of that canal. In some cases, however, the representatives of the prostate are made up of numerous rami- fied and complicated tubes, in which case they are called tubular prostates. In the hare and the rabbit, this gland is represented by the glandular mass, which, as above described, forms a portion of the walls of the vesiculos semi- nales, and which extends for some distance upon the muscular portion of the urethra (fig. 281. c). Fig. Male organs of the Water Vole (Arvicola amphibiui). a, glans penis; c, the urinary bladder; d, e, the testicles ; f, g, epididymis, situated at some distance from the testes ; k, I, vesiculaj seminales ; m, n, o, p, </, r, the prostates; s, the rectum, the extremity of which is surrounded by a glandular mass, t, from which a milky fluid is poured into the rectum in the vicinity of the anus, v. In the Alpine marmot it forms a consider- able mass situated above the commencement of the urethra, divided posteriorly into two roundish lobes. In the squirrel the prostate gland 5s as long as the muscular portion of the urethra, to which, however, it is only adherent at the tvo points where its excretory ducts penetrat
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