444 



ZOOLOGY 



SECT. 



hilus the tubules of the kidney converge to open into a wide 

 chamber the pelvis which forms the dilated commencement of 

 the ureter. When the kidney is cut across, its substance is seen to 

 be divided into a central mass or medulla and a peripheral portion 

 or cortex. An adrenal (suprarenal) ~body lies in contact with the 

 anterior end of each kidney. The ureter (Fig. 1034, ur.) runs 

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

 bladder (&/.). The latter is a pyriform sac with elastic walls which 



u r 



VCL 



II 



FIG. 1034. Lepus cuniculus. The urine-genital organs ; A, of male ; B, of female, from the 

 left side (half iiat. size). The kidneys and proximal ends of the ureters, in A the testes, and 

 in B the ovaries, Fallopian tubes and uteri are not shown, an. anus ; bl. urinary bladder ; 

 c. c. corpus cavernosum ; c. s. corpus spongiosuni ; c. gl. Cowper's gland ; g. cl. glans clitoridis ; 

 ff. p. glans penis ; p. gL perineal gland ;<p. gl'. aperture of its duct on the permeal - space ; pr. 

 anterior, pr'. posterior, and pr". lateral lobes of prostate ; ret. rectum ; r. gl. rectal gland ; 

 v..g. a. urinogenital aperture; M. m. uterus masculmus ; ur. ureter; va. vagina; vb. vesti- 

 bule ; v. d. vas deferens. (From Parker's Zootouiy.) 



vary in thickness according as the organ is dilated or contracted. 

 In the male the openings of the ureters are situated much 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 they occupy 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. 

 The sperms have an oval compressed head O005 mm. in length 

 and a slender " tail ' 0'045 mm. long. A convoluted epididymis 



