Carcinologlcal Fauna of India. 267 



line, of which three are on the cardiac and one is on the gastric region ; 

 in front of the latter are two smaller spines placed transversely : on 

 the branchial regions are some small spines set in two oblique series, 

 and one large spine. On the antero-lateral margins are about nine 

 small close-set blunt faintly-laciniated teeth, slightly increasing in size 

 posteriorly ; on the postero-lateral margin are two large spines ; and 

 on the posterior border, in the middle line, is a pair of spines. The 

 rostrum is broad, prominent, acute and declivous. The post-ocular 

 constriction is distinct ; and the hepatic regions are well marked, with 

 the outer border denticulate. The chelipeds in the male are about 2| 

 times the length of the carapace and rostrum : they much resemble 

 those of L. contrarius, the spines being for the most part jagged, and 

 the tubercles rasp-like. On the anterior (inner) margin of the arm are 

 10 or 12 spines alternating in size, the last three being very small ; 

 on the upper surface of the arm three spines are very prominent, as 

 are three or four on the posterior (outer) edge. On the anterior 

 (inner) margin of the hand are 7 or 8 spines increasing in size from 

 behind forwards ; while on the posterior margin are numerous spines 

 — only three or four of which are large. The lower surface of the 

 arms, wrists and hands is closely covered with large round rasp- like 

 tubercles. The merus and sometimes the two following joints of the 

 ambulatory legs, have the margins dentate. 



Our single specimen from the Arrakan coast, 13 fms., is plainly 

 the same as Haswell's L. spinifer, judging from his figure (torn, cit.) 

 Both from that figure and from our specimen I should consider the 

 species to be more nearly related to L. contrarius than to L. validus. 



Lambrus (Rlvinolambrus) pelagicus, Riipp. 



Lambrus pelagicus, Riippell, Beschr. u. Abbild. 24 Art. Krabbeu des Roth. 

 Meer., p. 15, pi. iv. fig. 1. 



Lambrus pelagicus, Milne-Edwards, Hisfc. Nat. Crust., I. 355. 



Lambrus pelagicus, Eiipp. (prob. = affinis, A. M.-Edw.) Miers, Ann. Mag. Nat, 

 Hist., 1879, Yol. IV. p. 21. 



Lambrus pelagicus, Ortmann, Zool. Forsch. in Austral, u. Malay. Archip., Jena, 

 1894, p. 46. 



Lambrus affinis, A. M.-Edw., Nouv. Archiv. du Mus., VIII. 1872, p. 261, pi. xiv. 

 fig. 4. 



Lambrus affinis, Haswell, Cat. Austral. Crust., p. 34. 



Lambrus affinis, Miers, 'Challenger' Brachyura, p. 95. 



Lambrus affinis, J. R. Henderson, Trans. Linn. Soc, Zool. (2) V. 1893, p. 350. 



[Lambrus affinis, F. Muller, Verh. Ges. Basel, VIII. p. 473.] 



[Lambrus affinis, Cano, Boll. Soc. Nat. Napol., III. 1889, p. 187.] 



Carapace, with rostrum, as long as broad: its regions well delimit- 

 ed and faintly pitted and pimpled, the furrows between the regions 

 113 



