1896.] A. Alcock — Garcinological Fauna of India. 219 



species. It differs from L. longifrons, De Haan, only in the following 

 characters, adults of both sexes being compared : — 



1. The carapace is closely punctate. 



2. The antero-lateral border is sharply crenulate. 



3. The hepatic regions although equally convex in the antero- 

 lateral margins, have their dorsal convexity hardly distinguishable 

 from the general convexity of the carapace. 



4. The terminal tooth on the ventral surface of the ischium of the 

 external maxillipeds of the female is extremely acute and prominent. 



5. Along the inner edge of the hand, below the upper row of 

 granules, which are very distinct, are several indefinite rows of granules. 



6. Along the inner edge of the upper surface of the wrist is a 

 line of 3 or 4 granules. 



7. The meropodites of the ambulatory legs have three distinct 

 longitudinal lines of granules, — one dorsal, two ventral. 



8. The propodites of the ambulatory legs have their dorsal edges 

 not merely sharp, but highly carinate, and have also their ventral edges 

 carinate. 



9. The colours, when good fresh spirit specimens are compared, 

 are very different. On the gastric region is a pair of large ocelli with 

 small white centres and very broad red outer rings. In faded speci- 

 mens the colours are much those of L. longifrons, but even then, instead 

 of two round spots or rings in the posterior half of the carapace, there 

 are from 4 to 6 large spots round the posterior half of the circumference 

 of the carapace. 



Its average size is a little less than that of L. longifrons. 

 In the Museum collection are 35 adult males and females from 

 Palk Straits, from Karachi, and from the Persian Gulf. 



486. Leucosia longifrons, var. pulcherrima, Miers. 



? Cancellus anatum primus, Enmpli, Amboin. Rariteitkamer, I. 27, pi. x. fig. A. 



leucosia pulcherrima, Miers, Trans. Linn. Soc, Zool., (2) I. 1875-79, (1877) 

 p. 236, pi. xxxviii. figs. 4-6 : Haswell, P. L. S., N. S. Wales, Vol. IV. 1879, p. 46, and 

 Cat. Austral. Crust, p. 119. 



Leucosia splendida, Haswell, P. L. S., N. S. Wales, Vol. IV. 1879, p. 47, pi. v. 

 fig. 1, and Cat. Austral. Crust, p. 119. 



This is certainly only a variety of L. longifrons, De Haan, from 

 -which it differs chiefly in the colouration, which is altogether richer 

 and more brilliant. Adult females compared, the only apparent differ- 

 ences from L. longifrons are as follows : — 



1. The surface of the carapace is slightly punctate. 



2. The propodites of the ambulatory legs are highly carinate 

 dorsally, and have also their ventral edges carinate, as in var. neocaledonica. 



