1900.] A. Alcock — Carcinohgical Fauna of India. 427 



Legs not much compressed : the meropodites are not broadened, 

 there is a spinule at the distal end of their anterior border : the dactyli 

 are slender but are shorter than the propodites. 



In the Indian Museum is a young female from the Nicobars : its 

 carapace is 8 millim. long and 9 broad. 



Henderson (Trans. Linn. Soc, Zool., (2) V. 1893, p. 893) describes a variety 

 of Sarmatium indicum (Milne Edwards, Nouv. Archiv. du Mus. IV. 1868, p. 174, pi. 

 xxvi. figs. 1-5) from Cochin. 



Metasesarma, Edw. 



Metasesarma, Milne Edwards, Ann. Sci. Nat. Zool. (3) XX. 1853, p. 188 : Kingsley, 

 Proc. Acad. Nat. Sci. Pbilad. 1880, p. 211 : de Man, Zool. Jahrb., Syst. IX. 1895-97, 

 p. 128. 



The most marked difference between this genus and Sesarma, which 

 it closely resembles, is that the tooth at the inner angle of the orbit 

 meets the thickened angle of the front, so as to completely exclude the 

 antennas from the orbit. 



The regions of the carapace are not defined, and the post-frontal 

 tubercles are inconspicuous : the front is vertically deflexed as in Sesarma, 

 but is deeper and overhangs the epistome : the reticulate appearance of 

 the pterygostomian and neighbouring regions is finer, closer, and more 

 confused : the orbits are more open below : the antennae are much 

 smaller : the legs are not so broad and compressed. 



The Metasesarmata are land and fresh- water crabs of the Indo- 

 Pacific region. 



115. Metasesarma Rousseauxii, Edw. 



Metasesarma Bousseauxii, Milne Edwards, Ann. Sci. Nat., Zool. (3) XX. 1853, 

 p. 188, and Archiv. du Mus. VII. 1855, p. 158, pi. x. figs. 1 a-c : Kingsley, Proc. Ac. 

 Nat. Sci. Philad. 1880, p. 211 : de Man, Zool. Jahrb., Syst., IV. 1889, p. 439, and IX. 

 1895-97, p. 138, and X. 1898, pi. xxix. fig. 28, and in Weber's Zool. Ergebn. Niederl. 

 Ost-Ind. II. p. 350 : Henderson, Trans. Linn. Soc, Zool., (2) V. 1893, p. 392 : 

 Ortmann, Zool. Jahrb., Syst., VII. 1893-94, p. 717. 



Sesarma Aubryi, de Man (nee A. M. Edw.), Journ. Linn. Soc, Zool., XXII. 1888, 

 p. 168. 



Carapace deepish, a little broader than long, smooth to the naked 

 eye, slightly convex fore and aft : a short semilunar groove separates the 

 gastric from the cardiac region, and there is a median longitudinal 

 post-frontal groove of some depth : the middle pair of post-frontal 

 tubercles are distinct, though not prominent, but the outer ones are 

 hardly distinguishable. 



