60 



the post-orbital regions are strongly deflexed, the rest of the carapace being 

 nearly flat. In a dorsal view the front is distinctly bilobed ; its edge is smooth 

 and its orbital angles are well marked, though its sides are decidedly convergent. 



The lower border of the orbit runs flush into the upper border without any 

 gap or any trace of an external orbital tooth. 



Antero-lateral margins of carapace short, ill-defined, irregularly crenulate 

 when magnified, running without break from the orbit; there is therefore no 

 trace of a lateral epibranchial tooth. 



Epigastric crests distinguishable as low, broad elevations; post-orbital 

 crests vaguely indicated. 



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

 7th segment is a triangle as broad as long. 



The mandibular palp is simple. In the external maxiUipeds the merus is 

 quadrangular and much broader than long, and the exopodite has a long 

 flagellum. 



The chelipeds are a little unequal ; their extensor surface is nearly smooth, 

 though faint squamiform markings are visible with a lens ; the spine at the 

 inner angle of the carpus, though coarse, is sharp ; the fingers are as long as the 

 palm, indistinctly fluted, and have a gap at the base when closed. 



The legs are stout and have somewhat hirsute edges ; the 2nd (longest) 

 pair are a little shorter than the larger cheliped ; the propodites are about twice 

 as long as broad and are slightly shorter than their dactyli. 



In an adult female the carapace is fths inch long, and Iths inch broad. 



6943 



3 ■ 



4071 



4 

 6966 



34. PoTAMON (Geotelphusa), sp. 



This small species, which is represented by a male and female not fully 

 adult, differs from ucUatretum in the following particulars : — 



The carapace is flatter and its anterior portion is abundantly rugulose ; the 

 antero-lateral margins are well defined low crests. 



The orbital angles of the edge of the front are rounded off". 



The epigastric and post-orbital crests are less indistinct. 



-jYj— Dafla Hills. H.H.Godwin-Austen. 1 ^,1 ?. 



