THE KEPEODUCTIVE SYSTEM. 



133 



Pen AcGl 



VES' YinS DCS 



Fig. 56. — A, reproductive organs of di'one, dorsal view, natural position : P., inner surface 

 of dorsal wall of bulb of penis (B, PenIS), showing gelatinous thickening (ss) ; C, 

 group of spermatozoa and intermixed granules ; D, terminal segments of male abdomen, 

 'showing the seventh terguni (VIIT) removed from its sternum (VITS) and the penis 

 (Pen) partly protruded ; E, lateral view of penis as invaginated within abdomen, and 

 ejaculatory duct {EjD). 



