246 Carcinological Fauna of India. 



large spines (exclusive of the large curved unequally-bifid post- ocular 

 spine) the first of which is often bifid: close to the posterior margin, 

 in the middle line, is a pair of smaller spines. 



The rostrum consists of two triangular teeth, which although 

 broader are not longer than the spines of the lateral margin. 



The eyes are of moderate length and are retractile into orbits 

 formed, as in Schizophrys, Maia, etc., of a supra- ocular eave, a large 

 post-ocular spine, with another spine in the interval between the two : 

 the supra-ocular eave has its angles slightly produced and spiniform. 



The broad short basal antennal joint ends in two stout teeth, and 

 has a third denticle on its outer margin. 



The chelipeds in the female and young male are slightly more 

 slender than the other legs, and are as long as the carapace or as the 2nd 

 pair of trunk-legs minus the dactylus : they have a long slender smooth 

 palm, nearly twice the length of the fingers. The ambulatory legs are 

 hairy, have short claw-like dactyli, and decrease gradually in length. 



In the Museum collection are specimens from the Madras coast 

 and from the Andamans. 



Alliance II. Stenocionopoida. 

 Criocaecinus, Edw. 



Criocarcinus, Milne-Edwards, Hist. Nat. Crust., I. 331. 

 Criocarcinus, Miers, Journ. Linn. Soc , Zool., Vol. XVI. 1879, p. 661. 



Carapace shaped and armed much as in Chlorinoides, but with the 



hepatic regions concave as in Micippe. The rostrum consists of two 

 curved almost vertically deflexed spines, which are fused together in 

 their basal half. The eye-stalks are slender and of extreme length. 

 The orbit is formed of a semi-tubular branching supra-ocular hood 

 which encloses the eye-stalk, and of a long slender post-ocular spine, 

 against the base of which the eye is retractile : the supra-ocular hoods 

 have the appearance of a pair of antlers. The basal antennal joint is 

 broad, and has a strong spine at either anterior angle : the mobile 

 portion of the antenna is freely exposed. 



The buccal frame is narrow behind and broad in front, as in 

 Micippe ; and the merus of the external maxillipeds is broader than 

 the ischium, and carries the palp at its deeply-notched internal angle. 



The chelipeds are shorter, and in the male somewhat stouter but 

 in the female somewhat slenderer, than the other trunk-legs, which 

 again are of no great length and decrease gradually from the 2nd pair. 



The abdomen consists of seven distinct segments in the male, of 

 five in the female. 



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