460 



ZOOLOGY 



SECT. 



anterior end of each kidney. The ureter (Fig. 1108, ur.) runs 

 backwards to open, not into a cloaca, but directly into the urinary 

 bladder (bl.). The latter is a pyriform sac with muscular walls 

 which vary in thickness according as the organ is dilated or con- 

 tracted. In the male the openings of the ureters are situated 

 nearer the posterior narrower end or neck than in the female. 



In the male Rabbit the testes are oval bodies, which, though in 

 the young animal occupying a similar position to that which 

 they retain throughout life in the Pigeon, pass backwards and 

 downwards as the animal approaches maturity, until they come to 

 lie each in a scrotal sac situated at the side of the urinogenital 

 opening. The cavity of each scrotal sac is in free communication 

 with the cavity of the abdomen by an opening the inguinal canal. 



l. u t The sperms have 



an oval compressed 

 "head' 0-005 mm. 

 in length and a 

 slender "tail" 

 0-045 mm. long. A 

 convoluted epi- 

 didymis, closely ad- 

 herent to the testis, 

 forms the proximal 

 part of the vas 

 defer ens. The vasa 

 dcferentia (v.d.) 

 terminate by opening 

 into a urinogenital 

 canal, or urethra, into 

 which the neck of 

 the urinary bladder 

 is continued. A pros- 

 tate gland (pr.) sur- 

 rounds the com- 

 mencement of the urethra, the neck of the bladder, and the terminal 

 part of the vasa deferentia. A diverticulum of the urethra the 

 uterus masculinus (u. m.) lies embedded in the prostate gland close 

 to the neck of the bladder. A small pair of ovoid glands, Cowper's 

 glands (c. gl.), lie just behind the prostate close to the side of the 

 urethra. 



The terminal part of the urethra traverses a cord of vascular 

 tissue, the corpus spongiosum (c. s.), which forms the dorsal portion 

 of the penis. The greater part of the penis is formed of two closely 

 approximated firm cores of vascular tissue the corpora cavernosa 

 (c.c.), which are attached proximally to the ischia, and terminate in 

 a pointed apex (g.p.). A loose fold of skin, the prepuce, encloses 

 the penis. A pair of glands with an odorous secretion, the perineal 



Vul- 



r.ut 



FIG. 1109. Lepus cuniculus. The anterior eud of the 

 vagina, with the right uterus, Fallopian tube and ovary (iiat. 

 size). Part of the ventral wall of the vagina is removed, and 

 the proximal end of the left uterus is shown in longitudinal 

 section, fl. t. Fallopian tube ; fl. t'. its peritoneal aperture ; 

 /. ut. left uterus ; 1. ut'. left os uteri ; ov. right ovary ; r. ut. 

 right uterus ; r. ut' . right os uteri ; s. vaginal septum ; 

 va. vagina. (From Parker's Zootomy.) 



