1895.] 
A. Alcock —Carcinological Fauna of India. 
263 
The chelipeds are massive and are about three times the greatest 
length of the carapace: tlieir surfaces are almost smooth: the arm 
is rhomboidal in transverse section, and the palm is sharply trigonal: 
the lower edges of the arm, wrist and palm form a continuous line of 
beading: the upper edge of the arm is granular and spinular: the 
inner or anterior edges of the arm, wrist and hand are spinate — the 
spines growing larger towards the end of the palm, while the posterior 
(or outer) edges of the same three joints are very strongly and closely 
laciniate. 
As usual the spines in all cases have a tendency to be alternately 
larger and smaller. 
Of the ambulatory legs the merus, carpus and propodus have the 
anterior (upper) border strongly and sharply carinate, while the merus 
has also the posterior border spinate. 
This species is not uncommon along the Orissa coast, from 8 to 23 
fathoms, 
Lambrus (Platylambrus ) carinatus , Edw. 
Lambrus carinatus , Milne-Edwards, Hist. Nat. Crust., I. 358. 
Lambrus carinatus , A. Milne-Edwards, Miss. Sci. Mex., Crust., 1. p. 147 (foot¬ 
note). 
Our specimens, which agree with the diagnoses of M. A. Milne- 
Edwards completely, are distinguished from those above described as 
L. prensor, (3) by having the mid-dorsal carina formed by three great 
compressed teeth ; (2) by the single, and very high and sharply cut 
carina on either branchial region ; (3) by the smaller size of the spine 
at the lateral epibranchial angle and of the spine, at the postero-lateral 
angle, immediately succeeding it; (4) by the form of the infra-orbital 
lobe, which instead of being entire, is bilobed—the inner lobe, more¬ 
over, having a rounded apex, and not being visible from above ; (5) 
by the meropodites of the ambulatory legs having their anterior (upper) 
edge serrate, not carinate, and by the carpopodites and propodites 
having the anterior edge smooth. 
These differences are constant in a series of twelve specimens, 
including both sexes. 
This species also differs from L. prensor in its much smaller size, 
three ovigerous females having the carapace 11 millirn. in its greatest 
breadth (exclusive of spines), while ovigerous females of L. prensor 
have the carapace 28 to 30 millim. in its greatest breadth exclusive of 
spines. 
