71 



which, to facilitate the work of identification, must be shown separately in the 



border of the merus of the 



following table : — 



I. A spine near the far end of the upper 



chelipeds ■•...... 



II. No such spine : — • 



A. Tips of fingers of chelae sharp : — 



i. Epigastric and post-orbital crests distinct and prominent : — 



1. Epigastric crests either in unbroken continuity with 

 the post-orbital crests on either side of the meso- 

 gastric groove, or almost in line with and more or less 

 distinctly (or more or less indistinctly) separated from 

 them ; exopodites of external maxillipeds with a strong 

 plumose flagellura ..... 



2. Epigastric crests in advance of and distinctly separated 

 from (sometimes overlapping) the post-orbital crests : — 



a. Exopodites of external maxillipeds with a strong 

 plumose flagellum .... 



/). Exopodites of external maxillipeds non-flagellate 

 in all but one species, and in that species in- 

 constant ...... 



ii. Epigastric and post-orbital ci-ests not prominent, more or 

 less indistinct, sometimes almost disappearing : — 



1. Exopodites of external maxillipeds flagellate 



2. Exopodites of external maxillipeds non-flagellate 



B. Tips of fingers broad and spooned : — 



i. Epigastric and post-orbital crests sharp and prominent ; 



exopodites of external maxillipeds strongly flagellate 

 ii. Epigastric, etc., crests almost obsolete ; exopodites of 

 external maxillipeds non-flagellate 



Paratelphusa. 



Barvtelphusa. / 



OZIOTELPHUSA. ij 



( 



Phricotelphusa. , ^ ' 



LlOTELPHUSA. 



Globitelphusa. 



I 



Paratelphusa blanfordi. 

 Globitelphusa pilosipes. ; 



Subgenus I. — Paratelphusa, Edw. 

 Type : Paratelphusa tridentata, Edw. 



The merus of the chelipeds has, usually (P. blanfordi is the only 

 Indian exception), a subterminal spine or sharp tubercle on its upper 

 border. 



The antero-lateral borders are usually {P. blanfordi and P. spinigera are 

 the only Indian exceptions) armed with either large spines, or a broad lobe 

 between the orbit and the lateral epibranchial spine. 



The epigastric and post-orbital crests are prominent. (In the Indian 

 species the former are not continuous with the latter.) 



The exopodite of the external maxillipeds carries a long, plumose 

 flagellum. 



The species are of moderate size : P. gpinigera grows large : none is quite 

 small ; in colour they are usually brown, sometimes very dark. 



