85 



In the male abdomen the 6tli segment approximates to the hour-glass 

 shape, the sides being much concave, the distal breadth not much exceeding 

 the proximal breadth, and the length decidedly exceeding the greatest breadth ; 

 the 7th segment also is longer than broad. 



Chelipeds subequal in the female, unequal^but not immoderately so— in 

 the adult male ; the merus is rugulose, but the carpus and hand are smooth to 

 the naked eye ; the tooth at the inner angle of the carpus is small ; the fingers 

 have hooked tips ; only one tooth, in the fixed finger of the larger chelae, is a 

 little enlarged ; the dactylus is a little longer than the palm, and the fixed 

 finger is not excessively broad. 



Legs strong, shorter than the smaller cheliped ; the longer propodites are 

 twice as long as broad, and are a little shorter than their dactyli. 



In the largest specimen, a female, the carapace is If inch long, 2s inches 

 broad, and Jifths inch deep. 



'^. Naga Hills. N. Belletty. 1^,19- 



-rr^, "TTT' Sibsagar, Assam. S. E. Peal. 1 cJ , 1 ? (types). 



Darband Pass, Cachar. J. Wood-Mason. 3 ^ , I ? . 



At first sight this species might suggest P. guerini ; but in P. guerini the 

 post-orbital crest ends on the dorsum of the carapace well behind and well 

 separated from the lateral epibranchial tooth, and the fingers of the chelae are 

 much clumsier. 



11. POTAMON (BaRYTELPHUSA), Sp. prOX. GUERINI et EDENTULA. 

 — — . N.E. Cachar. J. Inglis. 2 cJ , 1 ? (all young). 



These three young individuals— the carapace of the largest just exceeds 

 \ inch in length — agree well enough with P. edentula, but, being young, 

 the front is broader (more than a fourth but less than a third the greatest 

 breadth of the carapace), and the length of the 6th segment of the male 

 abdomen only equals its distal breadth, and is less than its proximal breadth. 



12. Paratelphusa (Barytelphusa) NAPiEA, Alcock. (Fig. 20.) 



This species is very very close to P. edentula, being, like it, annectant 

 between P. cunicu/aris on the one hand and P. lugubris on the other. 



It differs from P. edentula only in the following particulars : — 



The sm'face of the carapace is pitted, and the antero-lateral borders are 

 cristiform and finely and regularly crenulate. 



The epigastric crests are rugose and are more oblique, and hence the 

 suggestion of a break between them and the post-orbital crests is more 



