198 



masses lying one on each side of the 1st axonost on the 

 posterior wall of the body cavit}'. They are indistinctly 

 lohnlated, but not follicular as in the Cod and so many 

 other Teleosts. They are much smaller than the ovaries 

 in the female and project forwards only a little way into 

 the body cavity. There is no posterior extension beyond 

 the limits of the latter at any phase in the spawning' cycle. 

 They are tubular g'lands, but the walls of the seminiferous 

 tubules are closely opposed and there is little or no con- 

 nective tissue between them. The whole organ appears 

 therefore as if divided up by a system of irregular 

 trabeculse in the meshes of which are massed the sperma- 

 tozoa. 



Towards the ventral and anterior extremity of the 

 testes the volume of the organ rapidly diminishes, and if 

 traced in serial sections the number of tubules becomes 

 much less. Finally three or four such run forwards on 

 each side laterally and dorsally to the terminal portion of 

 the ureter. These unite, and a single duct on each side 

 runs alongside the latter and opens into its terminal 

 portion quite near the urinary papilla. The terminal 

 portion of the ureter is therefore a urinogenital sinus. If 

 the abdomen of a male fish when near the spawning season 

 be gently pressed, the seminal fluid issues from this 

 pa^jilla. In the female it is a urinary papilla only, in the 

 male a urinogenital papilla. 



