Indian Deep-sea Dredging. 405 



Family Dorippidae. 



Ethusa, Roux. 



92. Ethusa andamanica^ sp. n. 



This species closely resembles Ethusa on'entah's^ Micrs 

 ('Challenger' Brachyura, p. o."30, pi. xxviii. fig. 1), from 

 which it appears to differ only in the following points : — The 

 carapace is smooth instead of being granular ; the cervical 

 and cardio-branchial sutures are ill- instead of well-defined ; 

 the tooth at the external orbital angle is not so prominent in 

 relation to the front. 



A male from Station 115, 188-220 fathoms. 



Length of carapace about 9 millim., breadth about 9 millim., 

 length of cheliped 11 millim., length of third leg about 

 29 millim., length of fourth leg 11 millim. 



Compared with the other Indian species the most remark- 

 able character of Ethusa andamamca is the robustness of the 

 fourth and fifth pairs of legs. 



93. Ethusa tndica, sp. n. 



Carapace finely and closely granular and a little broader 

 than long. 



The front is bilobed and four-toothed ; the antero-latcral 

 or external orbital angle forms, not a tooth, as in Ethusa 

 andamanica, but a great spike projecting far beyond the frontal 

 spines ; the lateral margins are strongly convex in their 

 branchial extent and then converge, so that the breadth of the 

 anterior portion of the carapace is not two thirds that of the 

 posterior jwrtion. Tlie cervical and cardio-branchial sutures 

 are well marked, and the small tumid intestinal region stands 

 out like a wart between the even more tumid branchial 

 regions. 



The eye-stalks are slender and are freely mobile ; the eyes 

 are small but well developed ; the orbits are imperfect. 



The basal joint of the antennules is not inflated. The 

 antennary flagellum is only about half the length of the 

 carapace. 



The chelffi are equal ; the meropodite and fingers are 

 compressed and the carpus and palm inflated; the cutting- 

 edges of the fingers are closely apposable and are finely 

 crenulate in the distal half or two thirds. 



The dactyli of the second and third legs are broad 

 scimitar-like blades. 



