242 Memoirs of the Indian Museum. [Vol. V, 



of hairiness of the amiaulatory legs. In the specimens from the Chilka Lake the hairs 

 are much more numerous than in an individual from the Andamans and occur over 

 almost the entire length of the upper Iwrder of the merus. 



Miss Rathbun ' has given a fresh diagnosis of the allied West Indian C. giian- 

 humi, Latreille, which leads me to suppose that the species is distinct from C. 

 carnifex. 



The two .specimens are both males and are 61-5 and 62-5 mm. in length and yy~, 

 and 74 nun. in breadth. 



The colour in life is .striking. The dorsal surface of the carapace is livid purple 

 with a close and fine reticulation of yellowish-green which gradually disappears 

 towards the sides and is densest in the central part of the cardiac region. The 

 hepatic regions and the sides of the carapace are lilac. The ventral surface is cream- 

 coloured, the epistome tinged with purple. The chelipedes are cream-coloured, 

 deepening to yellow on the palm and fixed finger and suffused on the dorsal surface 

 of the merus and carpus with purple. The extreme tips of the fingers are brown. 

 The basal joints of the walking legs are yellowish; the merus, carpus and propodus 

 are deeply tinged with purple and bear dark brown hairs; the dactylus is orange 

 yellow. 



Colonies of this species inhabit the islands in the outer channel near Manikpatna. 

 In March 1914, when the water was low and as salt as that of the sea outside the 

 lake, large burrows of C. carnifex were found, their mouths often four or five inches 

 in diameter. Similar burrows were noticed below the surface of the water in the 

 vicinity and, on the shore, fragments of specimens that had been eaten by birds 

 were abundant. In vSeptember, when the water in the outer channel was fresh, the 

 species was also in evidence, but on this occasion, owing to the rise in the water-level, 

 mo.st of the burrows were below the surface. The crabs seem to live at a consider- 

 able depth in the mud and, as a rule, do not wander by day; it was in conse- 

 quence difficult to obtain .specimens. 



Family XANTHIDAE. 

 Genus HETEROPANOPE, Stimpson. 



1898. Heteropanope, Alcock, Joitrn. Asiat. Soc. Bengal, lyXVII, p. 207. 

 1907. Heteropanope, Stimpson, Smithson. Misc. Coll., LXIX, p. 62. 



Heteropanope indica, de Man. 



1888. Heteropanope indica, de Man, Joitrn. Linn. Soc., XXII, p. 53, pi. iii, figs, i, 2. 

 1898. Heteropanope indica, Alcock, Joitrn. Asiat. Soc. Bengal, LXVII, p. 208. 



I have compared the specimens in the collection with the individual recorded by 

 Alcock, apparently one of the two examples on which de Man based his original des- 

 cription, and find them in perfect agreement. 



' Rathbun, Bull. U. S. Fish Comm. for 1900, XX, pt. 2, p. 15 (1902) 



