Cardiological Fauna of India. 241 



legs. The clielipeds however differ, at any rate in the male, in which 

 sex they are stouter than any of the other legs, have the palms enlarged, 

 and the fingers arched and meeting only at the tips, which are not 

 excavated. 



The abdomen in both sexes consists of seven distinct segments. 



As Miers has pointed ont ('Challenger' Brachyura, p. 52), 

 Chlorinoides may be regarded as a sub-genus of Paramithrax, and is also 

 closely connected with Acanthophrys aculeatus A. Milne-Edwards (Ann. 

 Soc. Ent. Franc. (4) V. 1865, p. 140, pi. iv. fig. 4). According to Miers, 

 with w T hom I entirely agree, if Acanthophrys aculeatus is the type of the 

 genus Acanthophrys, then Chlorinoides is synonymous with Acanthophrys. 



Paramithrax (Chlorinoides) aculeatus, (Edw). 



Chorinus aculeata, Milne-Edwards, Hist. Nat. Crust. I. 316. 



Chorinus aculeatus, Adams and White ' Samarang,' Crust., p. 13. 



Paramithrax (Chlorinoides) aculeatus, var. armatus, Miers, Zool. H. M. S. 'Alert,' 

 pp. 182 & 193, pi. xviii. fig. A. 



Chlorinoides aculeatus, Miers, 'Challenger' Brachyura, p. 53. 



Chorinus aculeatus, C. W. S. Aurivillius, Kongl. Sv. Vet. Akad. Handl., Bd. 

 XXIII. No. 4, p. 38, pi. ii. fig. 7. 



Chlorinoides aculeatus, Henderson, Trans. Linn. Soc, Zool., 1893, p. 345. 



Carapace pyriform, convex, smooth, armed with five huge thorn- 

 like spines down the middle line, and with two even larger spines on the 

 branchial region : there are also, on either pterygostomian region, two 

 oblique crests, the anterior with three or four teeth — two of which are 

 visible in a dorsal view — the posterior with one or two. 



The rostrum consists of two large divergent horns, the length of 

 which is considerably more than half that of the carapace proper. 



The orbit consists of a supra-ocular hood, the angles of which 

 (especially the anterior) are strongly produced, of a bilobed post-ocular 

 tooth, and of a long spine filling the interval between the two, just as 

 in Maia spinigera. The basal antennal joint, as in most of the forms 

 included in this group, has a strong spine at its antero-external, and 

 another at its antero-internal angle. 



The chelipeds in the female are slender, and are only equal to the 

 post-rostral portion of the carapace in length : as in the male, the merus 

 has its crest-like upper and lower edges sharply scallopped and the carp- 

 us is cristate above. In the male the chelipeds are stouter than the 

 other legs, especially as to the palm, which is considerably enlarged. 

 The ambulatory legs decrease gradually in length from the 1st pair, 

 which are equal in length to the carapace plus two- thirds of the 

 rostrum : the merus in the first two pairs has a very strong spine at the 

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