260 
A. Alcock —Carcinological Fauna of India. 
[No. 2, 
II. Carapace strongly carinated or tuberculated, broadly tri¬ 
angular (considerably broader than long), with rounded 
sides and a broad but sharp-pointed projecting ros¬ 
trum : no post-ocular constriction : chelipeds with the 
arm and hand straight, sharply trigonal, the edges of 
these joints, as also the outer edge of the carpus, being 
very sharply and stoutly serrated. Platylambrus. 
III. Carapace granular or spiny, usually as long as broad, with 
a projecting rostrum, and a very distinct post-ocular 
constriction... Rhino lambrus. 
IY. Carapace granular, broader than long, and with the postero¬ 
lateral angle produced to form a great blade-like spine. 
Pterygostomian region deeply channelled, obliquely, the 
channel being closed below by thick fringes of hairs. Aulacolambrus. 
Y, Carapace worn and eroded, broader than long, almost semi¬ 
circular in outline, with the postero-lateral angle pro¬ 
duced ; the rostrum more or less deflexed, and not, or 
hardly, breaking the general outline: no post-ocular, 
but a fairly distinct post-hepatic constriction: cheli¬ 
peds with the arm and hand indefinitely contorted, not 
sharply trigonal; and with their edges, if spinate, irre¬ 
gularly and bluntly so; the carpus quite smooth exter¬ 
nally : the chelipeds are short for the genus. Parthenolambrus. 
Sub-genus Lambrus, A. Milne-Edwards. 
Lambrus , A Milne-Edwards, Miss. Sci. Mex. Crust., I. p. 146. 
Lambrus, Miers, ‘ Challenger’ Brachyura, p. 92, (part.) 
Carapace ovate-pentagonal, with the surface granular or pustular 
and but little carinate in the adult: rostrum exceedingly short. 
Lambrus longimanus , Leach. 
? Cancer spinosus longimanus, Rumph, Amboin. Rariteitk., pi. viii. fig. 2. 
Cancer macrochelos, Seba, III. xix. 1,8, 9. 
? Parthenope longimanus, Fabr. Suppl., p. 353. 
? Cancer longimanus , Linn., Syst. Nat., II. 1046, 42. 
? Cancer longimanus, Herbst, Krabben, I. ii, 253, taf. xix. figs. 105, 107. 
Lambrus longimanus, Leach, Trans. Linn. Soc., Yol. XI. 1815, p. 310; and 
Milne-Edwards, Hist. Nat. Crust., I. 354 ; and Cuvier, Regne Animal, pi. xxvi. fig. 
1; (and ? Lambrus longimanus , Adams and White, ‘ Samarang’ Crust., p. 30) ; and 
Bleeker, Crust de Find. Archip., p. 17 ( nec syn. pelagicus, Rupp.) ; and Miers, An n. 
Mag. Nat. Hist., 1879, Yol. IY. p. 20, and Zoology H. M. S. ‘ Alert,’ pp. 182 and 200, 
and ‘Challenger’ Brachyura, p. 95; and W. A. Haswell, P. L. S., N. S. Wales, Yol. 
IV. 1879, p. 449, and Cat. Austral. Crust., p. 31; and A. O. Walker, J. L. S., Zool., 
Vol. XX. 1890, p. 109; and de Man. J. L. S., Zool., Yol. XXII, 1888, p. 21 (ubi 
synon.) ; and Henderson, Tr. Linn. Soc., Zool., (2) V. 1893, p. 349. 
