57 



but sharp, its lower cusp also coarse ; fingers quite as long as palm, fluted and 

 pitted, the upper border of the dactylus with some vesiculous granules. 



Legs slender ; the first two pairs do not reach the tip of the larger 

 cheHped ; dactyli longer than their propodites, the latter about twice as long 

 as broad. 



In a full-grown female the carapace is t^ths inch long, Hths inch broad, 

 and T^g^ths inch deep. 



1917-18 



iV.5. — The specimens from Ajmere are indistinguishable from those 

 from Kurseong. 



31. PoTAMON (PoTAMiscus) SIKKIMENSE, Rathbun, vur. 



In this variety the epigastric crests ai-e not more prominent, but the 

 post- orbital crests are not so much lost in the rugosities of the carapace. 

 Also the anterior part of the cervical groove, bounding the gastric and 

 epibranchial regions, is more distinct, and, in fact, becomes quite recognisable 

 as a groove where it cuts the post-orbital crests. 



5444 

 To"' 



Sharping, Nepal. 



Museum Collector. 



15 (J, 6 $. 



32. POTAMON (POTAMISCUS) ANNANDALII, Alcock. (Fig. 10.) 



This species superficially resembles Potamon pealianum, but in addition 

 to other differences has external maxillipeds with a non-flagellate exopodite. 



Carapace : length between three-quarters and four-fifths greatest breadth, 

 depth half length, strongly convex fore and aft. The mesogastric area is 

 distinctly defined anteriorly and posteriorly, and the pair of small oval facets 

 between the gastric and cardiac regions is present, but there are no other 

 grooves on the carapace, even the cervical groove being restricted to the 

 curve that deUmits the mesogastric area posteriorly. The surface of the 

 carapace is smooth except for some fine pitting, and — just inside the antero- 

 lateral borders — some almost effaced wrinkles ; the side-walls have the usual 



