130 A. Alcock — Carcinological Fauna of India. [No. 1, 



p. 146 : Lena and Riohters, Abh. Senck. Ges. XII. 1881, p. 421 : Haswell, Cat. 

 Austral, Crust, p. 53. 



Etisodes dentatus, Ortmann, Zool. Jahrb. Syst. VII. 1893-94, p. 472. 



Carapace smooth (non- granular) : gastric region well denned except 

 at cardiac end, its surface broken, but not definitely lobulated ; similarly 

 with the branohio-hepatic regions. 



The antero-lateral border bears 7 or 8 (exclusive of the external 

 orbital angle) pro-curved claw-like teeth, uneven both as to size and 

 place, though four of them — which correspond to the 4 lobes of so 

 many other Cancroids — are much of one size and much larger than the 

 other 3 or 4. 



The front is lamellar with the free edge slightly and angularly 

 emarginate, and is cleft in the middle line by a fine sharp groove that 

 extends well on to the gastric region. The orbital margin has three 

 teeth, separated by fissures, in its outer part. The tooth at the inner 

 angle of the lower edge of the orbit is sharp, and does not come into 

 contact with the eave of the orbit. 



Chelipeds in the adult male a little more, in the adult female a 

 little less than twice the length of the carapace : the arm has a few 

 spinules and a good deal of hair along the upper border, and some 

 granules or blunt spinules along its lower and its distal borders ; the 

 wrist has a strong spike at its inner angle ; the hand may or may not 

 have a few pimple-like granules on its upper outer surface ; and the 

 fingers are fluted, the ridges on the dactylus being crenulate or dentate. 

 Otherwise the chelipeds are smooth. 



In the legs, the merus has both the dorsal and the ventral edges 

 thickly fringed with long stiff hairs, the dorsal edge being also granular ; 

 the carpus has at least three series of spinules along its dorsal surface ; 

 the propodite has a rather granular surface with about four (dorsal) 

 series of spinules, and has much of its lower edge fringed with long stiff 

 hairs ; and the dactylus is spiny above and hairy below. 



Colours of a specimen 7 years in spirit: upper surface bright 

 maroon fading to yellow near the posterior border ; fingers black. 



In the Indian Museum are a young female from Port Blair (Anda- 

 mans), and three large males (carapace 72 millim. by 111 millim.) from 

 Great Coco I. (Andamans) and East I. Andaraans. 



56. Etisus utilis, Lucas. 



Etisus utilis, Lucas in Jacquinot, Voy. Astrolabe, Crust, p. 27, pi. ii. fig. 6 : 

 Heller, Novara Crust, p. 16 : A. Milne Edwards, Nouv. Archiv. du Mas. IX. 1873, 

 p. 233 : E. Nauck, Zeits. Wiss. Zool. XXXIV. 1880, p. 58 (gastric teeth) : Lenz and 

 Richters, Abh. Senck. Ges. XII. 1881, p. 421 : Ortmann, Zool. Jahrb. Syst. VII, 

 1893-94, p. 472. 



