THE REPRODUCTIVE ORC 



341 



II. THE REPRODUCTIVE ORGANS. 



A. The male reproductive organs are t]ie testes and their 

 ducts. 



a. General description. The relations of the testes have 

 already been given (p. 234); the organs vary much in shape 

 and size in different individuals and with the different seasons; 

 when greatest they are spherical, or of a rounded oval form, occasion- 

 ally cone-shaped or pear-shaped. The surface of the testes is not 



FL-. 



II. 



CD 



H 

 LL 



jr 



Ife 

 I'r 

 tt 



The male reproductive organs (enlarged). 



Vasa effarentia within the kidney. 



IMfe 



CoUeetJng-nibe at inner border of kidney. 



Kidney. 



Vaea eBcicntia within the meaorcfaiam. 



an eoe 



tia 



ding blindlv . 



smooth, but presents a series of convexities, each corresponding 

 to a lobule of the gland. At the Ailus on the inner border the vessels 

 pass to and from the organ, and the Fa*a eferentia leave the testis. 

 The number of Taza tfferentia. (Tig. 222 I and II) is subject to 

 considerable variation, not only in different animals, but on the 

 two sides of the same animal. In some cases these ducts form a 

 network (I), in other cases this is absent (II) ; usually the ducts 



