1896.] A. Alcock — Garcinolog leal Fauna of India. 291 



Kotopus dorsipes, DeHaan, Faun. Japon. Crust, p. 139, pi. xxxv. fig. 5 : Stuler, 

 Abh. Ak. Berl. 1882 (1883) p. 17, pi. i. figs. 6 a-b and pi. ii. figs. 7 a-d. 



The greatest breadth of the carapace — at the fronto-orbital border 

 — is about two-thirds the greatest length. 



On the fronto-orbital border are 5 spines of about equal size, 

 separated by deep bights, the middle spine being the true front or 

 rostrum : the outermost spines on either side form the antero-external 

 angles of the carapace, are on a different plane from the others, and 

 are joined across the carapace by a serrated ridge. 



The carapace is a good deal pitted in the centre ; the lateral borders 

 in their anterior half have, like the surface of the merus of the external 

 maxillipeds and of the greater part of the pterygostomiaa region, 

 numerous squamiform granules ; in their posterior half the lateral 

 borders are finely raised, and milled. A raised ridge traverses the 

 carapace in the middle line from the tip of the front nearly to the 

 posterior border. The trigonal ischium of the chelipeds is somewhat 

 swollen and has its outer surface tattooed with linear dents with hairy 

 edges; the carpus has its dorsal surface serrated; the hand has hairy 

 linear dents and squamiform rows of serrations on both its surfaces, 

 but especially on the outer ; and the dactylus has a smooth cutting 

 edge and closes against a single distinctly large tooth at the tip of the 

 immobile finger. 



The true legs have one or both edges of many of their joints 

 scantily fringed with long stiff hairs : except in the case of the last 

 pair — in which the carpopodites and propodites are foliaceously ex- 

 panded — these joints are only moderately expanded ; and except in the 

 case of the penultimate pair — in which the dactylus is foliaceous — this 

 joint is broadly palmulate. 



In the Indian Museum collection are specimens from the Anda- 

 mans, and from off the Malabar coast 45 fathoms. 



Cosmonotus, Adams & White. 



Cosmonotus, Adams & White, ' Samarang ' Crust, p. 60, 1848. 

 Cosmonotus, Dana, U. S. Expl. Exp., Crust, pt. I. p. 404. 

 Cosmonotus, Henderson, ' Challenger ' Anomura, p. 32. 



Carapace elongate-heptagonal in outline, strongly convex, the 

 summit of the convexity forming a sharp mid-dorsal ridge. Instead of 

 a "front " there is a V-shaped excision, filled by the basal joints of the 

 eyestalks. The eyes are distinct, the eyestalks are slender and are 

 of remarkable length : each orbit forms a narrow trench just beneath 

 and along almost the whole length of either anterior border of the 

 carapace, the two orbits together forming a very perfect and obvious V. 



