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alimentary canal, opens beside, or as some observers believe 

 actually within the anus. The male organ is very small, with 

 a hookshaped point, and imperforate. It is grooved along its 

 ventral surface. The sucker on the tail is also regarded as 

 a reproductive organ, being said to assist in the act of 

 copulation. 



The seminal cells are very large, epithelium-like bodies, 

 which appear granular. 



Female : The vagina is a simple, oval tube, fairly long and 

 slightly twisted. It merges in the uterus, which is divided 

 into two branches. One branch runs backwards to the anus, 

 bends over the intestine, and then runs forward again as 

 far as the vagina, gradually becoming smaller. The other, 

 shorter, branch runs forward beside the intestine as far as 

 the oesophagus. Here it also bends and returns as far as 

 the vagina. Each branch terminates in fine convolutions 

 containing granular yolk -masses. These terminations, 

 apparently, represent the ovaries. 



