File:Elementary text-book of zoology (1884) (21044441850).jpg

Title: Elementary text-book of zoology
Identifier: elementarytextbo0201clau (find matches)
Year: 1884 (1880s)
Authors: Claus, Carl, 1835-1899; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858
Subjects: Zoology
Publisher: New York : Macmillan
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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292 MAMMALIA. cles), open close together into the urethra. At this point open the ducts of the prostates, which differ much in form, and are often divided into several groups of glands. Further down a second pair of glands, known as Cowper's glands, opens into the urethra. Re- mains of the Miillerian ducts, which in the female are used as the oviducts, frequently persist between the openings of the vasa deferentia. They are called the organ of Weber (uterus masculinus), and in the so-called Hermaphrodites their parts are much en- larged, and may be differen- tiated in the manner peculiar to the female sex. In all cases the end of the urethra, which functions as a uro- genital canal, is in connec- tion with external copulatory organs: these always have the form of an erectile penis, which, in the Mono- tremata, is concealed in a, pouch in the cloaca. The penis is supported by cavern- ous erectile bodies, which in the Monotremata are con fined to paired corpora cavernosa urethrae ; but in all other Mammalia there are, PIG. 677.—Urinary and sexual organs of Cricttim jn addition to the COTjniS vulqaris (after Gegenbaur). JZ, Kidney ; U, Ureter; , H, Urinary bladder ; T, Testo ; F, Puniculus sper- CavemOSUm urethra (c. spon- maticus (Spermatic cord); N, Epididymis; Vd, gioslun,) which is unpaired Vasdeferens; T's, Vesicul* seminales; Pr, Pro- ' state ; Sg, Urogenital sinus (Urethra); Gc, Cowper's and SUlTOUlu Is glands ; Gt, Tyson's glands ; i'p, Corpora caver- ^WQ Upper corpora cavemoSU nosa penis ; Cn, Corpus cavernosum urethra?; E, Glaus penis; P>>, Prepuce. penis, which are attached . the ischium, and only rarely fuse with one another. A cartilaginous, or bony support, the so-called os penis (Carnivora, fiodents), may also be developed, especially frequently in the glans, which is formed by the corpus cavernosum urethrce (fig. 077). The glans, which is bifid only in exceptional cases (Monotremntu. Marsupials),
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