426 Garcinological Fauna of India. 



S. indica, Milne Edwards, torn. cit. p. 186 fCeylon, Nicobars). 

 S. grucilipes, Milne Edwards, torn, cit, p. 182 (Nicobars). 



Sakmatium, Dana. 



Sarmatium, Dana, Silliman's Amer. Jonrn. Sci. (2) XII. 1851, p. 28S, and 

 Proc. Ac. Nat. Sci. Philad. 1851, p. 251, and U. S. Expl. Exp. Crust, pt. I. p. 357 : 

 Kingsley, Proc. Ac. Nat. Sci. Philad. 1880, p. 212 : de Man, Zool. Jabrb., Syst , II, 

 1887, p. 659. 



Metagrapsus, Milne Edwards, Ann. Sci. Nat., Zool., (3) XX. 18.53, p. 188. 



This genus, wliicli 1 almost agree with Dr. de Mau in regardinj^ 

 as only a subgenus of Sesarma, differs from. Sesarma in the following 

 particulai'S : — 



(1) the front, instead of being abruptly and vertically deflexed, 

 is gradually declivous and obliquely deflexed : 



(2) the antero-lateral borders of the carapace are usually a little 

 arched, instead of being in the same straight line with the postero- 

 lateral borders : 



(3) the abdomen of the male does not completely coincide with, 

 the breadth of the sternum at the level of the 5th pair of legs ; and 

 in the female the terminal segment is not deeply impacted in the penul- 

 timate segment. 



Distribution : West Indies, West coast of Africa, Indo-Pacific. 



114. Sarmatium crassum, Dana. 



Sarmatium crassum, Dana, Proc. Ac. Nat. Sci. Philad. 1851, p. 251 ; U. S. Expl. 

 Exp. Crust, pt. I. p. 358, pi. xxiii. figs. I a-d : Milue Edwards, Ann. Sci. Nat., Zool., 

 (3) XX. 1853, p. 189 : Kingsley, Proc. Ac. Nat. Sci. Philad. 1880, p. 212 : de Man, 

 Zool. Jahrb. Syst. II. 18S7, p. 6G0. 



Carapace deep, bioader than long, broader behind than in fi-ont, 

 smootli, with very faint indications of regions and no oblique stric3 on 

 the epibranclnal regions : of the post-fi-outal lobes the two middle ones 

 alone are distinct, and they are not prominent, they occupy almost all 

 the space between the orbits. 



The front is half the extent of tlie anterior bolder of the carapace, 

 its free edge is very little concave in the middle line. The antero- 

 lateral borders of the caiapace are distinctly arched and are cut into 

 2 broad blunt lobes (one of which is the orbital angle) followed by a 

 small tooth. 



Chelipeds "of male short, hand above transversely four to five- 

 plicate, externally nearly smooth, moveable finger with four short 

 rudiments of spines, carpus mostly smooth, a few seriate granules 

 above." In the female the transverse plicati(ms of the upper surface 

 of the hand are very indistinct and the dactylus is smooth. 



768 



