74 



2. Paratelphusa (Paratelphusa) trilobata, Alcock. (Fig. 15.) 



Havino- only one specimen, I hesitate to characterize this species, although 

 it is quite clearly something unusual. It resembles F. spinvjera, but differs in 

 the foUoAving particulars : — 



The carapace is flatter, its depth being less than half its length, and the 

 cervical groove is much broader. The posterior boundary of the epibranchial 

 regions is much better defined on the dorsum of the carapace. 



The antero- lateral border of the carapace is produced as a large, broad, 

 laminar lobe between the external orbital tooth and the acute epibranchial 

 spine. 



The spine of the upper border of the merus of the chelipeds is blunt — 

 more a tubercle than a spine. 



In an adult female the carapace is 1 inch long, ItV inch broad, and roths 

 inch deep. 



6969 

 3 ■ 



Sibsagar, Assam. 



S. E. Peal. 



1 9 (type). 



