196 A. Alcock — Garcinological Fauna of India. [No. 2, 
In the Museum collection there are several females, hut only two 
males, from various parts of the Andamans, up to 20 fathoms. 
Simocarcinus, Miers. 
Simocarcinns, Miers, Journ. Linn. Soc., Zool., Vol. XIV. 1879, p. 649. 
As Huenia , but 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). 
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 thau twice the length of the 3rd pair 
and than thrice the length of the 5th pair, are equal 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 Nicobars—measures 
30 millim. in length of carapace and rostrum. 
Simocarcinus simplex (Dana). 
Huenia simplex and brevirostrata, Dana, U. S. Expl. Exp. Crust. I. pp. 133 and 
134, pi. vi. figs. 3a-c, 4 a—c. 
Simocarcinus simplex, Miers, Jour. Linn. Soc., Zool., Vol. XIV. 1879, p. 649; and 
‘ Challenger ’ Brachyura, p. 35 (uli synon.). 
\_Simocarcinus simplex, Cano, Boll. Soc. Nat. Napol. III. 1889, p. 173.] 
Simocarcinus simplex, J. R. Henderson, Tr. Linn. Soc. Zool. (2) V. 1893, p. 342. 
This species is distinguished from Simocarcinus yyramidatus (Hell.) 
(1) by the much shorter rostrum of the male; (2) by the presence of 
