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



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

 8. gracilipes, Milne Edwards, torn. cit. p. 182 (Nicobars). 



Sarmatium, Dana. 



Sarmatium, Dana, Sillinian's Amer. Jonrn. Sci. (2) XII. 185 J, 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. Jahrb., Syst , II, 

 1887, p. 659. 



Metagrapsus, Milne Edwards, Ann. Sci. Nat., Zool., (3) XX. 1853, p. 188. 



This genus, which I almost agree with Dr. de Man in regarding 

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

 particulars : — 



(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 : Milne 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. 1887, p. 6G0. 



Carapace deep, broader than long, broader behind than in front, 

 smooth, with very faint indications of regions and no oblique stria? on 

 the epibranchial regions : of the post-frontal 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 the anterior border of the carapace, 

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

 lateral borders of the carapace 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 plications of the upper surface 

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



