36 



(3) The carpus of the chelipeds has its anterior border much broader and 

 more inflated — the curious inflated border is one of the most characteristic 

 features of the species ; 



(4) On the upper surface of the pahu there are, in addition to the strong 

 serrations of its inner border, two or three rows of large pustulous or bullous 

 tubercles — another characteristic feature. 



In other particulars this species agrees with andevsoruanum. 

 Length of carapace 1^ inch, greatest breadth 1|- inch. 



6904 I Hotha, Yunan ; ) I Anderson '^ ^ ^ Vtvnes^ 



-3-- \Kakhyen Hills, Ponsee, Upper Burma./ J- ^"cieison. ^j<j,Wpes;. 



16. POTAMON (PoTAMON) EDWARDSI, var. HIRTUM. (Fig. 43.) 



In this variety the tufts of bristly setae on the dorsum of the carapace may 

 be so numerous as to give the specimen a harsh woolly feel, and the edges of 

 the legs are decidedly hirsute. 



The pustule-like tubercles of the upper surface of the palm may be more 

 numerous and smaller. 



Length of carapace li inch, greatest breadth 1^ inch. 



. Sheetee Hill, Kakhven Hills, Upi)er Burma. J. Anderson. w. j .^ s 



3 'J 'II ^types and cotypes). 



Hotha, Yunan. J. Anderson. 1 $ . 



17. Potamon (Potamon) hispidum, Wood-Mason. (Fig. 4.) 



Tilphusa liispida. Wood-Mason, Journal Asiatic Society of Bengal, XL., 1871, Part II., p. 452, pi. xxviii., 

 figs. 1-5. 



Potamon hupidus, M. J. Rathbun, Nouv. Arcliiv. du Museum, Paris (4), VI., 1904, p. 279 {nbi lit.). 



This species resembles P. under sonianum and edivardsi in the shape and 

 proportions of the merus of the external maxillipeds, but difters in the following 

 particulars : — 



(1) The carapace is broader, its length being slightly less than three- 

 fourths its greatest breadth ; 



(2) The grooves of the dorsum of the carapace are broader and shallower, 

 the areolation of the gastric region is less distinct, and the surface sculpture is 

 more effaced ; 



(3) The cervical groove, besides being more superficial, takes a wider 

 sweep so as to cut the post-orbital crests at a point almost outside the longi- 

 tude of the external orbital spine ; 



(4) The post-orbital crests are lower and blunter ; 



(5) The chelipeds have a much smoother surface. 



Carapace with tufts of short setse both on dorsum and on side-walls ; its 

 length slightly less than three-fourths its greatest breadth, its depth about two- 



4018 

 4 



