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 hy 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 Echiuoplux inoseleiji, 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. 

 hoc. Andaman Sea, 90 to 177 fathoms. 



Platymaia, Miers. 

 Platymaia, Miers, ' Challenger' Brachyura, p. 12. 



Carapace sub-orbicular. Rostrum 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. Eves 

 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 lone 1 in- 



