278 A. Alcock— Carcinological Fauna of India. [No. 2, 
Tlie chelipeds are massive and nodular, but even in the male are 
only about, half as long again as the carapace. 
The ambulatory legs have the 3rd, 4th and 5th joints compressed 
and irregularly dentate along one or both edges. 
Our specimens, which are rather damaged, come from the Anda¬ 
mans to 20 fathoms, and from off Colombo, 26^ fathoms. 
Lambrus (Parthenolambrus ) harpax, Ad. and Wh. 
Lambrus harpax, Adams and White, ‘ Samarang ’ Crustacea, p. 25, pi. vi. fig 3. 
La?nbrus harpax, Haswell, P. L. S., N. S. Wales, Vol. IV. 1879, p. 450; and Cat. 
Austral. Crust., p. 32. 
Lambrus harpax, Miers, Zoology H. M. S. ‘Alert,* pp. 182 and 202; and 
‘ Challenger ’ Brachyura, p. 99. 
Male. Carapace depressed semi-elliptical, as long as broad, its 
surface almost smooth. The median region is carinated, the carina 
bifurcating anteriorly to enclose an elongate-triangular depression 
behind the eyes, and carrying a large spine in the gastric region 
(at the poiut of bifurcation), another large spine in the cardiac region, 
and a much smaller spine in front of the latter. 
The lateral margins are cristiform, with a series of crenations and 
sutures indicating fused teeth ; and the hepatic region is prominent, 
with a cristiform edge: the postero-lateral angle is surmounted by an 
upturned laciniated tooth, the postero-lateral margins are dentate, and 
on the posterior border is a triangular tooth with an obscurely tri- 
lobed tip : from the bluntly laciniated tooth of the postero-lateral augle 
a carina runs obliquely forwards and inwards onto the posterior part 
of the branchial region. 
The rostrum is strongly deflexed, and ends in an obscurely and 
unevenly trilobed tip. The chelipeds in the male are nearly 2| times 
the length of the carapace, and are thin and compressed, with sharp, 
almost cristiform, edges : in the arm both the inner and outer edges are 
unevenly dentate, and the lower edge faintly granular: the carpus has 
the outer edge compressed and crenulate : the thin hand has its inner 
edge crenulate, has a curved line of granules on its inner surface, and 
some granules on its outer surface: the movable finger has its upper 
edge crenulated at base. The ambulatory legs are compressed, with 
the 3rd, 4th and 5th joints oristated above, especially in the last two 
pairs : in the last pair these joints have both margins rather strongly 
dentated. 
Our specimen is from the Andamans. 
Miers (Zoology H. M. S. ‘Alert,’ p. 202) considers L. sandrockii , 
