548 THE RABBIT CHAP. 



and generative organs, and trace each ureter from the hilus of the 

 kidney backwards to the bladder, which, if contracted, may be inflated 

 from the urinogenital aperture. Then make out 



A. In the male (Fig. 144 A) : 



1. The penis, with the prepuce, and the aperture of the urinogenital 

 cana^ or urethra, which latter is lined by the soft corpus spongiosum, and 

 strengthened by the corpora cavernosa, which diverge proximally and 

 are attached to the ischia. 



2. The scrotal sacs, each communicating with the abdominal cavity 

 by the inguinal canal, through which the corresponding spermiduct and 

 the spermatic artery and vein pass to the spermary, to see which and 

 the epididymis the scrotal sac should be slit open along its ventral wall. 



3. The course of- the spermiducts. 



B. In the female (Figs. 144 B and 145) : 



1. The vulva ; and the clitoris, with its corpora cavernosa, on the 

 ventral wall of the urinogenital canal. 



2. The vagina, uteri, and Fallopian tubes with their funnels. 



3. The ovaries, studded with ovisacs. 



IX. Dissect away the kidneys, ureters and in the male the scrotal 

 sacs, in the female the ovaries from the surrounding parts : cut through 

 the pelvic symphysis with a knife, and sever the attachment of the 

 corpora cavernosa to the ischia. Remove the whole of the urino- 

 genital organs, together with the posterior end of the rectum, from the 

 body and after noting VII, 3 and 4, pin them out in a dissecting-dish, 

 with the ventral side uppermost, taking care to preserve the natural 

 relations of the parts. Dissect away all the superfluous connective- 

 tissue and fat, separate the rectum at its cut end from the urinogenital 

 canal, and turn it on one side, noting the rectal and perineal glands. 

 Make out, in addition to the parts referred to in VIII : 



A. In the male. The uterus masculinus and prostate, and the spermi- ' 

 ducts passing between the former and the bladder. 



Sketch the entire dissection. Then slit open the uterus masculinus so 

 as to see the openings of the spermiducts, remove the rectum and rectal 

 glands, and make out the relations of the corpus spongiosum. Make a 

 median incision along the whole length of the penis, beginning at the 

 apex and cutting through the fibrous septum between the two corpora 

 cavernosa : continue the incision forwards, so as to open the bladder 

 along its ventral wall, and note and indicate on your sketch the opening 

 of the uterers into the bladder, and the crescentic aperture of the uterus 



