URNATELLA GRACILIS. 119 



amined, but in numerous specimens I have been unable to detect the slightest trace of gene- 

 rative structures ; while on the other hand, the stomach is almost constantly more or less 

 filled with large leucophroid bodies, which I am inclined to suspect are the reproductive 

 bodies." 



The annexed figure of Urnatella is so strongly suggestive of the marine genus Pedicellina 

 that I feel much tempted to place Urnatella in the sub-order Pcdlcellinea, in which it would 

 then become the type of a distinct family in this sub-order. With our present imperfect 

 Wiowledge of its anatomy, however, such an association would hardly be justified, and I have 

 therefore deemed it most advisable to view it for the present as the type of a sub-order of 

 gymnolsematous Polyzoa, premising at the same time that this location is to be considered as 

 purely provisional. 



