37 



fifths its length ; flat behind the frontal slope. Gastric region well defined but 

 not well areolated, the fore-limit of the posterior lobe of the mesogastric sub- 

 region being indistinct. The epibranchial regions are somewhat vaguely divided 

 into four areolae by a broad and shallow obliquely transverse depression, which 

 is crossed by an even shallower sinuous depression roughly parallel with the 

 cervical groove. The broad and superficial cervical groove cuts the post- 

 orbital crests at a point almost outside the line of the external orbital tooth. 

 The surface of the frontal and gastric regions is not distinctly rugose. The 

 usual oblique rugse of the antero-lateral part of the epibranchial regions are 

 represented but indistinctly, as also are the rugae of the side-walls. 



The epigastric crests are separated from the post-orbital crests by a fissure, 

 but form the very slight convexity of a common curve with them. The post- 

 orbital crests are rugose, depressed, and blunt, and they almost fade away 

 outside the point of intersection of the cervical groove. 



Front little declivous, not one-third the greatest breadth of the carapace, its 

 edge well defined, smooth or faintly crenulate, sinuously four-lobed. External 

 orbital tooth not acute, separated from the lower border of the orbit by a notch. 



Antero-lateral borders of carapace about equal in length with the postero- 

 lateral, raised, gently curved, beaded ; the lateral epibranchial tooth not salient. 



In the male abdomen the 6th segment is nearly twice as long as broad, 

 and the 7th is as long as broad. 



Inter-antennular septum broad, formed about equally by epistome and front. 

 First (true 2nd) antennal joint squarish, the two succeeding joints in contact 

 with and covered by the front. 



In the external maxillipeds the merus is of an irregular hexagonal shape, 

 and is just as long as broad. In other respects the mouth- parts ai*e as 

 described for P. Jluviatile var. ibericum, but the flagellum of the external 

 maxillipeds is small. 



Except for their comparative smoothness, the chelipeds are of the P. 

 andersonianwm style : that is to say, the carpus has its anterior edge somewhat 

 swollen and its dorsal surface consequently somewhat umbilicated, and the 

 fingers are broad so as not to gape when closed. The outer smface of the wrist 

 and hand are not smooth, but they are not tuberculous ; under a lens they are 

 reticulate-rugulose. 



The edges of the legs are thickly beset with tufts of stifi" bristles ; the 

 propodites are short and broad. 



Length of carapace 1^ inch, breadth If inch. 



Kakhyen Hills, Poonsee, Upper Burma. J. Anderson. I c? (type). 



3 



4007 



7089-90 



Kakhyen Hills, Poonsee, Upper Burma. J. Anderson. 1 ? . 

 Moung Sal, Mekhok R. Dr Gray. 1 t?, 1 ?. 



