1898.] A. Alcock — Cardiological Fauna of India. 157 



Key to the Indian species of Xanthodes. 



I. Chelipeds equal, hands and wrists closely granular, 

 outer surface of hand with three deep parallel longi- 

 tudinal furrows X. lamarclcii. 



II. Chelipeds markedly unequal, hands and wrists, at any 

 rate of the smaller cheliped, studded with sharp spine- 

 like tubercles X. notatus. 



82. Xanthodes lamarckii (Edw.). 



Xaniho lamarclcii, Milne Edwards, Hist. Nat. Crust. I. 391 : A. Milne Edwards, 

 in Maillard's l'ile "Reunion, Annexe F, p. 4 : Heller, Novara Crust, p. 10: Ortmann, 

 Zool. Jahrb. Sysfc. VII. 1893-94, pp. 444, 448. 



Xanthodes lamarclcii, A. Milne Edwards, Nonv. Archiv. du Mus. IX. 1873, p. 200, 

 pi. vii. fig. 3 : flilgendorf, MB. Ak. Berl. 1878, p. 789: Miers, Zool. H. M. S. Alert, 

 pp. 517, 529: F. Muller, Verh. Ges. Basel, VIII. 1886, p. 474: de Man, Archiv. 

 fur Naturges. LIII. 1887, i. p. 263 ; and in Weber's Zool. Ergebn. Niederl. Ost-Ind. 

 II. 1892, p. 278 ; and Zool. Jahrb. Syst. VIII. 1894-95, p. 513 : Whitelegge, Mem. 

 Austral. Mus. III. 1897, p. 130. 



Xanthodes granosomanus, Dana, Proc. Ac. Nat. Sci. Philad. 1852, p. 75; and 

 U. S. Expl. Exp. Crust, pt. I. p. 175, pi. viii. figs. 10a-c. 



Xantho granosomanus, Heller, Novara Crust, p. 11. 



The anterior and anterolateral parts of the carapace are to a 

 variable extent granular, the posterior part is generally quite smooth. 



Fronto- orbital region marked off by a sinuous groove, gastric region 

 well delimited and fairly distinctly divided into 3 sub-regions, branchio- 

 hepatic regions incompletely traversed by 2 grooves proceeding from 

 the 2nd and 3rd intervals of the antero-lateral border : no other grooves 

 on the carapace. 



Outer angle of front not very pronounced, separated from the 

 supra-orbital margin by a faintish groove. The grooves of the orbital 

 margin are almost indistinguishable. 



Antero-lateral border divided into four broadish granular lobes, 

 the last two of which are more acuminate (but bluntly) than the others. 



Chelipeds equal in both sexes, stout, rather short (less ihan twice 

 the length of the carapace) ; arm hidden beneath the carapace in repose, 

 its anterior and posterior edges hairy, the upper part of its posterior 

 surface granular : upper and outer surfaces of wrists and hands as 

 closely as possible covered with pearly granules, the wrist also has a 

 few indistinct dimples, and the outer surface of the hand is deeply 

 scored by three parallel longitudinal furrows : fingers rather lono- 

 pointed. 



Upper edge of meropodites of legs very finely serrulate : surfaces of 

 next three joints closely granular in the vicinity of the upper (anterior) 



