196 A. Alcock — Oarcinological Fauna of India. [No. 2 r 



In the Museum collection there are several females, but only two 

 males, from various parts of the Andamans, up to 20 fathoms. 



Simocarcinus, Miers. 



Simocarcinus, Miers, Journ. Linn. Soc, ZooL, Vol. XIV. 1879, p. 649. 



As Huenia, hut without the supra-ocular spine; with the chelipeds 

 much stouter, especially as to the palm, which is much inflated ; and 

 with the ambulatory legs more cylindrical. 



Simocarcinus pyramidatus (Heller ) r 



Huenia pyramidata , Heller, Crust. Roth. Meer., in SB. Akad. Wien XLIII. 1861 

 p. 307, pi. i. fig. 9. 



Description of the Male. 



Carapace elongate-triangular, narrowing to a huge, deep, laterally 

 compressed rostrum of greater length than the carapace : the hepatic 

 regions are marked by a faint bulge, and the lateral epibranchial angles- 

 are very sharp cut, while the limits of the posterior border are bounded 

 on either side by a small lobule. Except for a somewhat elongate 

 eminence on the gastric region and a tubercle on the posterior cardiac 

 region, the carapace is perfectly smooth. 



The eyes are deeply sunk, and nearly immobile, and the cornea is 

 somewhat deficient in pigment. 



The chelipeds, which are markedly stouter than the other legs, are 

 a little shorter than the carapace and rostrum ; and the next pair of 

 legs, which are a good deal more than twice the length of the 3rd pair 

 and than thrice the length of the 5th pair, are eqnal in length to the 

 carapace and rostrum. The palms are broadly inflated ; and the fingers, 

 which are strongly arched, meet only at the tips. 



The ambulatory legs are cylindrical, and their dactyli are stout, 

 strongly recurved, and toothed along the posterior margin. 



Our single perfect specimen — a male from the Nieobars — measures 

 30 millim. in length of carapace and rostrum. 



Simocarcinus simplex (Dana). 



Huenia simplex and brevirostrata, Dana, TJ. S. Expl. Exp. Crust. I. pp. 133 and 

 134, pi. vi. figs. Sa-c, 4a-c. 



Simocarcinus simplex, Miers, Jour. Linn. Soc, Zool., Vol. XIV. 1879, p. 649; and 

 • Challenger' Brachyura, p. 35 (uli synon.). 



[Simocarcinus simpler, Cano, Boll. Soc. Nat. Xapol. III. 1889, p. 173.] 



Simocarcinus simplex, J. E. Henderson, Tr. Linn. Soc. Zool. (2) V. 1893, p. 342. 



This species is distinguished from Simocarcinus yyramidatus (Hell.) 

 (}) by the much shorter rostrum of the male: (2) by the presence of 



