Carcinologicul Fauna of India. 427 



Legs not much compressed : the meropodites are not broadened, 

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

 are slender but are shorter than the jjropodites. 



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. 393) describes a variety 

 of Sarmatiu7n indicum (Milne Edwards, Nouv. Archiv. du Mus. IV". 1868, p. 174, pi. 

 xxvi. figs. 1-5) from Cochin. 



Metasesakma, Edw. 



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

 Proc. Acad. Nat. Sci. Philad. 1880, p. 211 : de Man, Zool. Jahrb., Syst. IX. 18^5-97, 

 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 

 antennte 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 antenna) are much 

 smaller : the legs are not so broad and compressed. 



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

 Pacific reerion. 



115. Metasesarma Bousseauxit, Edw. 



Mdtasesnrma Boiosseauxii, 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-Iud. II. p. 35U: Henderson, Trans. Linn. Soc, Zool., (2) V. 1893, p. 392 : 

 Ortmann, Zool. Jahrb., Syst., VII. 1893-94, p. 7l7. 



Sesai-ma Auhryi, de Man (wee 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 fi-om 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. 



769 



