380 Records of the Indian Museum. [Vol. Ill, 



Subgenus Gecarcinucus (Type : G. jacquemontii, Edw.). 



In this subgenus the lower outer corner of the orbit forms a 

 gutter-Hke recess and there is no trace of a lateral epibranchial 

 denticle. 



Gecarcinucus (Gecarcinucus) edwardsi, Wood-Mason, sp. nov. 



Differs from G. jacquemontii in that the sides of the front are 

 convergent, and the finger-cleft and the neighbouring part of the 

 inner surface of the palm are covered with a thick, shaggy mat of 

 hair. 



From Khandalla : one male. 



Subgenus Cylindrotelphusa (Type : Gecarci^iucus steniops). 



Carapace and front as in Gecarcinucus , but the orbit is of the 

 usual form and there is a small lateral epibranchial denticle. 



Gecarcinucus {Cylindrotelphusa) steniops (Wood-Mason), sp. nov. 

 " Telphusa steniops," Wood-Mason (MS. name only). 



Carapace subcylindrical : ' ' cervical groove ' ' forming a long 

 narrow loop, the trend of which is fore-and-aft ; very broad and deep 

 and dividing the carapace into tumid lobe-like regions. Front a 

 long, narrow, square-cut, strongly-deflexed lobe, hardly wider than 

 the orbit. Antero-lateral borders of carapace full, blunt, coarsel}^ 

 crenate : a small lateral epibranchial tooth, placed close to the orbit. 

 Epigastric crests broad and low : post-orbital crests low, blunt, in- 

 distinct, crenulate or broken in their outer half. In the sixth 

 segment of male abdomen the length equals or slightly exceeds the 

 distal breadth : seventh segment a good deal longer than broad. 



Efferent branchial openings subtubular and exposed, as in 

 Gecarcinucus (and in some species of Paratclphusa). Mandibular 

 palp as in Parateiphusa tridentata, Edw. Exopodites of all the 

 maxillipeds with a strong flagellum. 



From Travancore : 14 males, it females. 



With reference to my last paper in this series. I find that a 

 subgeneric name Oziotelphusa was given by P. Miiller to ' ' Telphusa ' ' 

 hippocastanum , MiiU. = " Potamon " hydrodromus (Herbst). This 

 name Oziotelphusa must therefore be adopted for the subgenus 

 Leschenaultia , though I may explain that in using the name Oziotel- 

 phusa it is the bare name, and nothing but the bare name, that I 

 accept. Parateiphusa {Leschenaultia) hydrodromus and bouvieri 

 will, therefore, now stand as Parateiphusa {Oziotelphusa) hydro- 

 dromus and bouvieri. 



Again, I find that " Parateiphusa " nilotica, Edw., is not a 

 true Parateiphusa of the Parateiphusa tridentata, type ; but has a 

 simple mandibular palp like those species {dayanum, wood-masoni 

 (= edwardsi), crenuliferum, and martensi) which I have here sepa- 

 rated as a subgenus of Potamon under the name of Paratelphusula. 



