328 CRE.S8WELL SHEAKEK. 



obliterating it. From the way in which this lip is protruded 

 and the pit opened when the animal is feeling its way or 

 examining any small object it may come across in crawling 

 on the bottom of a watch-glass^ it is evident that the pit 

 functions in some way as an organ of taste or smell. It 

 appears to receive a set of nerve-fibres from the brain. There 

 is no doubt that these pits correspond to the ciliated pits of 

 the Archiannelids, despite their small size. Tbey are present 

 ill both sexes. According to Haswell they are not present in 

 Stratiodrilus. 



9. The Refkodcctivk System. 



T^he reproductive organs in the male consist of a testis, 

 paired in its anterior part, two vesicula) seminales, two 

 vasa deferentia, and a median penis. Dorsal to each vesicle 

 is the so-called granule gland (fig. 11). In relation with the 

 penis there is a gland of unknown function, as in Stratio- 

 drilus. 



In the female the organs consist of a lai'ge sac or ovary 

 filling the whole of the generative region. On its ventral 

 surface this is furnished with a paired oviduct, armed with a 

 large funnel, the dorsal lip of which only is ciliated. On the 

 course of the oviducts and close to their external openings 

 are the ampnllje or shell-glands. 



A. In the Male. 



The testis in the male when fully developed tills the anterior 

 and middle third of the generative region. Its extreme 

 anterior end is separated into a right and left portion, its 

 middle portion is fused in the median line. Behind it ends 

 somewhat abruptly in front of the penis. The remaining pos- 

 terior third of the generative region is taken up with the 

 penis and its accessory glands. This portion is sharply 

 divided from the anterior two thirds by the limiting membrane 

 of the testis. This fact has not been clearly shown by 

 Foettinger. He seems to have overlooked the well-defined 



