170 
Transactions of the Society. 
My impression, on first examining this creature, was that it might 
perhaps be a naupliiform stage of some higher crustacean, but this 
view can scarcely, I think, be entertained, the general condition of the 
appendages being much more in accordance with the idea of retro- 
gression arising from parasitic habits. 
The views here expressed and the names applied to the various 
appendages must be taken as purely tentative and provisional. The 
animal is to a large extent anomalous, and some of the parts — as, for 
instance, those which I have called “ maxillae ” and “ tentacular cirri ” 
— are so entirely unlike anything known to me in other Entomo- 
straca, that their true nature and homologies must be left for future 
investigation. 
What I mainly hope to achieve by bringing the subject before 
this Society is to point the way into a field of investigation which, 
I think, is likely to prove of the very highest interest. 
I must, in conclusion, express my sincere thanks to Miss Barton 
for having allowed me to examine and describe her specimens. 
