1896.] A. Alcock — Carcinological Fauna of India. 281 



The second true leg is three times as long as the carapace, and very 

 much less than twice the length of the fourth leg. 



The adult male has the carapace 12 millim. long and 11 5 millim. 

 broad, as has also the apparently adult female. 



In the Indian Museum collection are eight specimens from the 

 Andamans, Mergui, Orissa coast, and Karachi. 



Several of them are encrusted with a small species of Scalpellum, 

 and one carries across its back a large (inhabited) worm-tube, which is 

 said by Dr. Giles to be a habit with this species. 



101. Dorippe polita, Alcock and Anderson. 



Dorippe polita, Alcock and Anderson, J. A. S. B., Vol. LXIII. 1894, pfc. 2, p. 208, 

 and 111. Zool. ' Investigator,' Crustacea, pi. xxiv. fig. 4 (in the press). 



General surface of the body and appendages smooth hard polished 

 and free of hairs : there are a few scanty hairs on the edges only of some 

 of the joints of the chelipeds and external maxillipeds. 



The extreme length ot' the carapace is a very little less than the 

 extreme breadth : the grooves that define the regions are shallow and 

 not very conspicuous. The end of the endostomial channel projects 

 between, and a little beyond the tips of the frontal teeth ; and has its 

 free edge emarginate, so that the front appears to consist of four sharp 

 lobes, the median two of which are on a lower level than the other two. 



The spine at the outer angle of the orbit is broadly triangular, its 

 tip scarcely surpasses the level of the tips of the frontal teeth : the 

 spine at the inner canthus is blunt and very small and inconspicuous : 

 the portion of the carapace that covers the base of the eyestalk is, as in 

 D. astuta, in simple continuity with the side of the front. 



The abdominal terga of the female are smooth and polished. 



The second pair of true legs are about 2| times the length of the 

 carapace and are very much less than twice the length of the fourth 

 pair; their carpopodites, like those of the first pair, are faintly bicari- 

 nate. The pleura covering the bases of the last two pairs of legs are 

 singularly large. 



The larger of two ovigerous females in the Indian Museum col- 

 lection has the carapace 11 "5 millim. long and 12 millim. in extreme 

 breadth. 



Ethusa, Roux. 



Ethusa, Roux, Crust, de la Mediterranee, pi. xviii. and text relating thereto. 

 Ethusa, Milne Edwards, Hist. Nat. Crust. II. 161. 



Ethusina, S. I. Smith, ' Albatross ' Crustacea, 1883, in Ann. Rep. U. S. Conim. 

 Fish, &c, 1882 (1884). 



Ethusa, Miers, ' Challenger' Brachyura, pp. 328, 331. 



J. ii. 36 



