1895.] A. Alcock — Carcinological Fauna of India. 275 



of L. hoplonotus, but the spines, especially those on the outer edge of 

 the band, are very much longer, slenderer, and more acute. 



Several specimens, including ovigerous females, of this small 

 species are in the Museum collection, from Arakan ; and from off Ceylon, 

 34 fathoms. 



The figure in Adams and White is an admirable illustration of this 

 species. 



Sub-genus Parthenolambrus, A. M.-Edw. 



Parthenolambrus, A. Milne-Edwards, Miss. Sci. Mex. Crust., I. p. 148. 

 Parthenopoides, Miers, Journ. Linn. Soc, Zool., Vol. XIV. 1879, p. 672. 

 Parthenolambrus, Miers, ' Challenger ' Brachyura, p. 99. 



Carapace semi-elliptical or semi-circular, with a nearly straight 

 posterior margin, the postero-lateral angles being strongly produced. 

 Chelipeds of no great length, never sharply serrate, and with the arms 

 and hands indefinitely contorted. The rostrum is more or less deflexed. 



Key to the Indian species of the suh-genus Parthenolambrus. 

 I. Carapace with the hepatic regions very prominent in the 

 antero-lateral margin : — 



1. Carapace broader than long, strongly convex, no- 



dular and eroded: chelipeds less than twice 



the length of the carapace L. tarpeius. 



2. Carapace as long as broad, compressed, with crist- 



iform edges, its surface almost devoid of gra- 

 nules : chelipeds more than twice the length 



of the carapace L. harpato. 



II. Carapace with the hepatic regions distinct, but not marked- 

 ly prominent : — 



1. Rostrum almost vertically deflexed : ambulatory 



legs dentate, but without true spines L. calappoides. 



2. Rostrum moderately deflexed, with a prominent 



median lobe : meropodites of ambulatory legs 



each with three rows of close sharp spines L. beaumontii. 



Lambrus (Parthenolambrus) calappoides, Ad. and Wh. 



Parthenope calappoides, Adams and White, ' Samarang ' Crustacea, p. 34, pi. v. 

 fig. 5. 



Lambrus calappoides, Haswell, P. L. S., N. S. Wales, Vol. IV. 1879, p. 452 ; and 

 Cat. Austral. Crust., p. 35. 



Lambrus calappoides, Miers, Zoology of H. M. S. ' Alert, ' pp. 517 and 527 ; and 

 1 Challenger ' Brachyura, p. 101. 



Parthenolambrus calappoides, R. I. Pocock, Ann. Mag. Nat. Hist., 1890, Vol. V. 

 p. 75. 



Carapace almost semi-circular in outline, with an indentation 

 J. ii. 35 



