Carcinological Fauna of India. 249 



basal pieces are usually linear and hidden. The abdomen of the female 

 consists of 3 or 4 pieces. 



Key to the Indian species of Pseudophilyra, 



I. Front tridentate, the whole of its free edge 

 projecting well beyond the epistome : 

 carapace strongly convex : buccal cavern 

 elongate, truncate-triangular, quite as in 

 Lettcosia : — 



1. Carapace closely and coarsely punc- 

 tulate : hepatic regions defined : 



thoracic sterna of male normal P. tridentata. 



2. Carapace smooth and polished : third 

 thoracic sternum of male with two 

 processes or teeth, — one on either 

 side of the abdomen : — 



i. Hepatic regions defined : hands 

 longer than broad : processes 

 of third thoracic sternum stout, 

 and projecting only on to the 



second sternum P. pusilla. 



ii. Hepatic regions not defined : 

 hands as broad as long : pro- 

 cesses of third thoracic ster- 

 num laminar, and projecting 

 well on to the first sternum ... P. wood-masoni. 

 II. Front divided almost from the base by a 



deep longitudinal groove, its free edge 



straight and projecting just beyond the 



epistome : carapace strongly convex, 



with most of the regions well defined and 



tumid ; the branchial, cardiac, post-gastric, 



and to a less extent the hepatic regions 



are, at any rate in the male, conspicuously 



granular in their tumid portion : buccal 



cavern a little broader than long P. blanfordi. 



III. Front with a single median tooth, the tip 



of which alone projects beyond the epis- 

 tome : carapace moderately convex, with 



the hepatic regions defined : buccal cavern 



as long as broad P. melita. 



254 



