The Urogenital Organs 



193 



A fairly wide ureter, Fig. 54, u, Fig. 55, d, 

 extends from the posterior end of each kidney to 

 open (Fig. 54, u\ Fig. 55, e) 

 into the anterior region of the 

 cloaca, as described in con- 

 nection with the digestive 

 system. 



The ovary, Fig. 54, o, as 

 noted above and as seen in 

 Figs. 54 and 55, in the young 

 animal is of practically the 

 same shape as the testis. The 

 ova at this stage are of mi- 

 croscopic size and are hence 

 not visible to the naked eye. 

 The ovary, even at this stage, 

 is more or less distinctly 

 marked off into lobiiles by a 

 series of small grooves. 



The oviduct. Fig. 54, f , which 

 at this stage is, of course, of 

 small diameter, extends across 

 the ventral surface of its cor- 

 responding kidney and opens, 

 f, into the posterior part of 

 the cloaca as has already been described. Its 

 peritoneal opening is some distance cephalad to 

 the head of the ovary. Its course from this 

 opening is straight until about the anterior end 

 of the ovary; it then becomes somewhat con- 



,^N 



\/ 



\ 



\ t 



ir 



Fig. 54. Female Urogen- 

 ital System. 



/, oviduct; /', opening of ovi- 

 duct; k, kidney; m, mesentery; 

 o, ovary; u, ureter; u'-, open- 

 of ureter. 



13 



