VII 



THE REPRODUCTIVE ORGANS 



The male organs of reproduction are limited 

 to the two testes, each with its deferent duct. 

 In the fowl there is no homologue of the 

 mammalian penis. 



The testes are small ovoid organs, placed 

 ventral to the anterior lobes of the kidneys 

 (Fig. 35). Their size is not constant since 

 they become larger during the breeding season. 

 Nor are the two organs necessarily of equal 

 volume, for the left is often somewhat larger 

 than the right. The medial border of each 

 testis is slightly concave, and carries a small 

 flattened projection which represents the epi- 

 didymis of mammals. From this arises the 

 deferent duct, which pursues a wavy course 

 lateral to the ureter and enters the cloaca, 

 where it opens on the summit of a small 

 papilla. The deferent duct is narrow at its 



