260 



Carcinologiral Fauna of India. 



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 Pl A ty lambrus. 



III. Carapace granular or spiny, usually as long as broad, with 



a projecting rostrum, and a very distinct post-ocular 



constriction Rhino lambrus. 



IV. 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. 



V. Carapace worn and eroded, broader than long, almost semi- 

 circular in outline, with the postero-lateral angle pro- 

 duced ; the rostrum more or less defiexed, 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. 





Lamlrus, 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, Humph, 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. 1016, 42. 



? Cancer longimanus, Herbst, Krabben, I. ii, 253, taf. xix. figs. 105, 107. 



Lambrus longimanus, Leach, Trans. Linn. Soc, Vol. 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 

 Blocker, Crust dc Find. Archip., p. 17 (nee syn. pelagicus, Bupp.) ; and Miers, Ann. 

 Mag. Nat. Hist., 1879, Vol. IV. p. 20, and Zoology 11. M. S. ' Alert,' pp. 182 and 200, 

 and 'Challenger' Brachyura, p. 95; and W. A. Haswell, P. L. S., N. S. Wales, Vol. 

 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., Vol. XXII. 1888, p. 21 (ubi 

 .) ; and Henderson, Tr. Linn. Soc, Zool., (2) V. J 893, p. 349. 



106 



syn on. 





