180 
A. Alcock — Carcinological Fauna of India. 
[No. 2, 
gent acicular spines of uniform size, is finely granular, with certain 
definitely placed distant thornlike spines of conspicuous magnitude, 
namely :—four in triangle on the gastric region, two side by side on the 
cardiac region, two side by side on the intestinal region, three on each 
hepatic region, and three on each branchial region: besides these there 
are some smaller spines on the lateral aspect of the pterygostomian and 
branchial regions : 
2. The rostral spines are less divergent, and have elegantly 
curved tips : 
3. The abdominal terga (of the young female), instead of being 
everywhere closely covered with pungent spines, are merely finely and 
distantly granular, with a single large spine on the first tergum, and a 
pair of smaller spines on the second, in the middle line : 
4. The legs are much less spiny, the propodites of the ambulatory 
legs being fringed with stiff bristles instead of spines : 
5. The colour differs, being, in spirit specimens, a warm brown, 
instead of a pale yellow. 
It differs from Fchinoplax moselei/i , Miers, judging from the figures 
and description, in the following particulars :— 
1. The regions of the carapace are well delimited by sharp cut 
grooves : 
2. The rostral spines are considerably less than half the length of 
the carapace proper : 
3. The armature is altogether different, the large stout spines of 
the present species standing out on a finely granular carapace, and the 
abdominal terga being distantly granular. 
Total length of carapace 35 millim., breadth of carapace 21 millim., 
greatest span (2nd pair of trunk-legs) 150 millim. 
Loc. Andaman Sea, 90 to 177 fathoms. 
Platymaia, Miers. 
Platymaia, Miers, ‘ Challenger’ Brachyura, p. 12. 
Carapace sub-orbicular. Nostrum short, tridentate owing to the 
size and projection of the interantennulary septum. No pre-ocular spine ; 
but a post-ocular spine against which the eye is retractile, but which 
affords no concealment to the eye. Epistome extremely narrow. Eyes 
large, with short eye-stalks. Basal antennal joint short, cylindrical, 
and perfectly free: the flagellum and part of the peduncle visible from • 
above. 
External maxillipeds with the meropodite narrow, and bearing the 
next joint at its summit. Chelipeds in the male long, with a long in- 
