4 

 1877 

 10 ■ 



120 



In large adults of both sexes the carapace is a little under ^ inch 

 long, a little over ^ inch broad, and a little over ^ inch deep. 



This species at first sight resembles gubernatoris and pilosipes from the 

 same station ; but it is at once distinguished by the extremely broad front ; by 

 the narrow antennular fossse, and the tightly impacted and almost rudimentary 

 antennal peduncle ; by the very short hairy exopodites of the external maxilli- 

 peds ; and by the long narrow 5th abdominal segment of the adult male ; 

 moreover, the carapace, instead of being flat, is strongly convex. P. 2yilosipes 

 has some tufts of bristles on the legs, but they are not so numerous ; and again, 

 in pilosipes the fingers have peculiar broad spooned tips. 



4023 , , T^ 1 . (22 (t , o Q fincludinff 



^ Mahableshwar. Donor unrecorded. -! ^ ' types) 



Poena and Mahableshwar. Bombay Nat. Hist. Soc. 1 (J , 1 ^ . 



Genus III.^ — Gecarcinucus. 



Gerarcitiurus, Milne Edwards, in Jacquemont's Voy. dans I'lnde, IV., Crust., p. 44, 1S44 ; Mary J. Ratlibun. 

 Xouv. Ari-hiv. du Museum (4), VIII., 1906, p. 6rt [ubi Hi.). 



The difference between Gecarcinucus and Parateljjhusa is so slight, and is 

 so nearly bridged over, that only an innate feeling of reverence for ancient 

 landmarks prevents me from uniting the two. 



The carapace is oval and subcylindrical (as it is in some species of Paniti'l- 

 phasa). 



The cervical groove is very deep and broad, and forms a rather long and 

 narrow loop, the ends of which have a fore-and-aft rather than a lateral trend ; 

 but a cervical groove nearly of this kind is found in some species of Paratel- 

 phiisa (e.g., P. pulvinata). 



The epigastric and post-orbital crests are low and not at all conspicuous ; 

 but this sort is not uncommon in Pai'atelphusa. 



The antero-lateral borders of the carapace are rather full and tumid, their 

 cm've is hardly broken, and there is no distinct lateral epibranchial spine ; but 

 there are a few species of Paratelphusa of which the same can be said. 



The abdomen of the adult male is more regularly triangular — that is to say, 

 there is no sudden contraction in width in its terminal half; the 6th segment is 

 long rather than transverse — that is to say, its length is at least equal to its 

 distal breadth ; and the 7th segment is elongate, generally tongue-shaped ; but 

 there are some .species of Paratelphusa that have almost the same shape of 

 abdomen. 



The oral edge of the epistome is everted on either side of its median lobe, 

 and the front edge of the meropodites of the external maxiUipeds is separated 

 from it, so that the channelled plate of the endopodite of the first maxillipeds is 



