422 A. Alcock — Carcinological Fauna of India. [No. 3, 



angle of the wrist, though well pronounced, is not spiniform : the 

 transverse beaded ridge on the inner surface of the palm is very 

 short : 



(4) the dactylus of the chelae is not nearly twice the length of the 

 upper border of the palm, and the milled crest on its upper surface con- 

 sists of not more than 40 teeth : 



(5) the meropodites of the legs are remarkably foliaceous, their 

 greatest breadth, in the case of the 2nd and 3rd pairs, being more than 

 half their length : all the leg joints are thinner and natter : 



(6) the dactyli of the legs are remarkably short, their length, in 

 the case of the 2nd and 3rd pairs, being less than half the length of 

 their propodites. 



In the Indian Museum is a single male from the Andamans : its 

 carapace is nearly 35 millim. long, and a little over 30 millim. broad 

 across the antero -lateral angles. 



109. Sesarma politum, de Man. 



Sesarma pnlita, de Man, Zool. Jahrb. Syst. II. 1887, p. 654 : Journ. Linn. Soc, 

 Zool., XXII. 1888, p. 189, pi. xiii. figs. 7-9. 



Carapace shallow and much depressed, a good deal longer than 

 broad, all the regions well defined : the four post-fronfcal lobes of the 

 gastric subregions are deep-cut and very prominent, their anterior over- 

 hanging edges are serrated and their surface bears some transversely 

 arranged sharpish tubercles : the two middle lobes are decidedly larger 

 than the outer ones. There are no oblique striae on the epibranchial 

 regions. 



Front more than half the breadth of the carapace, its free margin 

 markedly sinuous. The lateral borders of the carapace are nearly 

 parallel though slightly sinuous : there are two well cut teeth behind 

 the outer orbital angle. 



Chelipeds equal, and not so very much longer than the carapace : 

 the outer surface of the arm wrist and hand are closely beset with 

 small tubercles, which in places have a squamiform look, and the inner 

 surface of the palm is granular but has no transverse ridge: the inner 

 and outer borders of the arm, the inner border of the wrist, and the 

 upper border of the palm and movable finger are conspicuously serru- 

 late, and there is also a noticeable dilatation near the far end of the 

 inner border of the arm. There are no pectinated crests of any sort 

 on the palm, and the fingers—both surfaces of which are smooth and 

 polished — have no large gap between them when closed. 



The legs are shortish, the 3rd pair being hardly If times the length 



