300 



Transactions. 



triangular tooth near the middle of palm, not defined, the end passing insen- 

 sibly into the convex hind margin, finger with concavity near the hinge, 

 then a broad protuberance, extremity curved to fit the end of the palm.. 



Fig. 14.—Talorchestia ielluris, male. 



Fig. 15. — First gnathopod of male. 



Fig. 16. — Second gnathopod of male, first form (less enlarged than 

 fig. 15). 



In the second form the palm is oblique but well defined by a stout tooth 

 on the outer side, while on the inner side there is a short blunt thumb-like 

 process, the end of the finger fitting in between the two, near the base of 



