BLADDER, ETC. OF MALE RABBIT. 33 



having been introduced into it from the bladder at a. The penial urethra conveys both urinary 

 and seminal products in all mammals above the Monotremata, in which group it conveys 

 seminal products only, reversing the functions of the homologous canal of those female mam- 

 mals, such as the Rat and the Mole, in which there is a closed clitorid urethra. 

 e. Anus. 



f. Penis, with vertically elongated backward-looking orifice. 



g. Hairless patch on to which the ano-preputial glands open. 

 h. Upper prostatic glands. 



i. Lower prostatic glands. 

 j. Cowper's glands. 



k. Larger and smaller ano-preputial glands, rudimentary in man. 



/. Corpus cavernosum of right side in section, with parts of the pubo-cavernosus and ischio-cavernosus 

 muscles lying upon it. 



below this area the anus opens at e. The rectum, c y has been displaced 

 outwards and to the right so as to give an unimpeded view from behind of 

 the organs just described. At its upper part it carries, attached to its 

 longitudinal muscular coat, two hydatids, the cystic stage (Cysticercus 

 pisiformis] of Taenia serrata, which takes on its cestoid or ' strobile ' form 

 in the intestines of the Dog or Fox. 



A comparison of this preparation with such figures as those of the 

 homologous organs in the human subject at pp. 419, 428, figs. 304, 310 of 

 Quain's Elements of Anatomy, 8th ed. 1878, will show clearly the different 

 proportions of the organs in the two subjects respectively, whilst a com- 

 parison of it with the similarly dissected and displayed preparation of the 

 female organs of the Rabbit (see infra, Prep. 9, Fig. 5, p. 37, and Descrip- 

 tion, pp. 34-38) will show the close correspondence which exists between 

 the male and female organs in this animal from the commencement of the 

 urogenital canal outwards. The structure of the crura clitoridis and that 

 of the crura penis are strikingly similar, especially in the very considerable 

 thickness of their external fibrous sheath. The median septum which these 

 sheaths form by their apposition remains distinct throughout the length of 

 the compound organ they make up, as is the case in many mammals of 

 the Rodent and other orders which possess a penial ossicle, whilst in the 

 Ungulata, such as Cervus, Sus, Tapirus, Eqims, and the Cetacea there is 

 neither median septum nor penial ossicle. 



An excellent article on the male generative apparatus and the anal 

 glands of Mammals by Prof. Leydig is to be found in the Z. W. Z. ii. 

 pp. 1-58, 1850. One of similar merit on the Uterus masculinus, s. Vesicula 

 prostatica, by Professor R. Leuckart, is contained in the Cyclopaedia of Anatomy 

 and Physiology, sub voc. 'Vesicula prostatica,' 1852. See also E. H. Weber, 

 Abhandlungen Jablonowskischen Gesellschaft, 1846, pp. 382-385, 396, 405, Taf. 

 v. figg. 1-3, where the generative organs of the Rabbit are figured ; as also one 

 by Van Been, Z. W. Z. i. Taf. xx. 1849, and the work by Martin-Saint- 

 Ange, L'Appareil reproducteur des Animaux Vertdbr^s, PI. i. and ii. 1854. See 

 also Huschke in Soemmering's Anatomic, 1844, and a good article, translated by 



D 



