418 A. Alcock — Car etiological Fauna of India. [No. 3, 



The meropodifces of the legs are foliaceous, but their breadth is not 

 twice their length ; but otherwise the legs are as in S. quadrature. 



The abdomen of the male is decidedly narrow. 



In the Indian Museum are 26 specimens from the Andamans and 

 one from Madras. The carapace of a large one is 33 millim. long and 

 38 millim. broad : in the female the carapace is not so broad. 



103. Sesarma Andersoni, de Man. 



Sesarma Andersoni, de Man, Zool. Jahrb., Syst., II. 1887, p. 657, and Journ. Linn. 

 Soc. Zool. XXII. 1888, p. 172, pi. xii. figs. 1-4. 



Carapace moderately deep, hardly convex, considerably broader 

 than long, the four post -frontal lobes of the gastric region only moder- 

 ately prominent, nearly equal, pitted ; the cardiac and intestinal regions 

 faintly indicated ; the oblique striations of the epibranchial regions 

 very sharp and distinct, one of them almost projects beyond the lateral 

 border as a tooth behind the orbital angle. 



Front more than half the greatest breadth of the carapace, not very 

 deep, its free margin a little convex but nearly straight. The lateral 

 borders of the carapace are slightly convergent posteriorly : except for 

 the afore-mentioned projection of the first branchial ridge there is no 

 tooth behind the orbital angle. 



Chelipeds much larger in the male than in the female, but the 

 difference is not so marked as in S. quadrature. The inner border of 

 the arm ends in a very acute denticulated lobe : the palm is traversed 

 on the outer surface, near the lower border, by a fine raised line, and on 

 the upper surface in the male are numerous short parallel oblique striae 

 one of which at least is most elegantly pectinate : in the female these 

 crests are less numerous and less distinct : the upper surface of the 

 dactylus of the male is milled, the lameilas increasing in size and coarse- 

 ness from behind forwards. 



At the distal end of the posterior border of the meropodites of the legs 

 are three or four strong spines, decreasing in size from behind forwards, 

 but there is no subterminal spine on the anterior border : in other re- 

 spects, except that the dactyli are slightly shorter, the legs are very 

 similar to those of S. quadrature. The male abdomen is broad. 



In the Indian Museum are 8 specimens from Mergui : the carapace 

 of the largest is 7 millim. long and 9 millim. broad. 



104. Sesarma lanatum, n. sp. 

 Carapace deepish, dorsally flat, everywhere covered, as also are the 

 appendages, with a dense fur amid which are freely scattered little dense 



