216 A. Alcock— Garcinological Fauna of India. [No. 2, 
the length of which in the male is about twice, in the female about once 
and a fifth, that of the carapace. 
The post-ocular lobe is unique is form : it is very prominent, and 
has a stout pedicle and a compressed crown, the angles of which are 
produced. The supra-ocular eave is also unique : it also is very promi¬ 
nent, and has its antero-external angle produced forwards and upwards, 
and its postero-external angle produced backwards towards the post¬ 
ocular lobe. The basal antennal joint is deeply grooved longitudinally : 
its antero-external angle forms a strong spine visible from above, and 
its outer edge bears two distinct teeth which stretch towards the supra¬ 
ocular and post-ocular spines respectively. All the trunk-legs are very 
slender: the first two pairs have a strong spine on the far end of the 
upper border of the merus, but this in the last three pairs is represent¬ 
ed by a small tubercle. The chelipeds, even in the male, are slender 
throughout, and have long slender Hated palms which are three times 
the length of the fingers : the latter, though denticulated throughout 
and but little arched, meet, in the male, only in their distal half. 
The first pair of ambulatory legs are, as usual, much the longest: 
in all the dactyli are long and slender, but have the posterior edge 
sharply serrated. 
This also is a small species, an egg-laden female of average size 
measuring oi ly 17 millim., more than half of which is rostrum. 
Off Cheduba (Arakan coast) 7 fathoms : off Ceylon 30-34 fathoms. 
Dr. Henderson (Tr. Linn. Soc., Zool., 1893, p. 344) also includes 
in the Indian Fauna, but with some doubt, the two following species :— 
J. Hyastenus convexus, Miers Zool., H. M. S. ‘Alert,’ p. 196, 
pi. xviii. fig. B. ( N. E. Australia; Penang.'). 
2. Hyastenus brockii, de Man, Archiv. fur Naturgesch. LIII., 1887, 
p. 221, taf. vii. fig. 1. ( Amboina ). 
As Dr. Henderson seems to be not quite sure of his identification, 
and as we have no specimens in the Museum collection, I have not 
noticed these two species at length. 
Naxta, Edw., Miers. 
Naxia, Milne-Edwards, Hist Nat. Crust. I. 313. 
Naxia, de Haan. Faun, Japon. Crust , p. 84. 
Naxia , Miers, Journ. Linn. Soc., Zool., Yol XIY. 1879, p. 658 (et synon. 
Naxioides, A. M. Edw. and Podopisa Hilgendorf); and ‘Challenger’ Brachyura, 
p. 59. 
Carapace subpyriform, moderately convex, rounded behind, and 
armed with spines or tubercles on the dorsal surface. Spines of the 
