120 A. Alcoek — Carcinological Fauna of India, [fro. 1, 



Leptodius sanguineus, A. Milne Edwards, Nouv. Archiv. da Mus. TV. 1868, p. 71, 

 and IX. 1873, p. 224: Richters in Mbbius, Meeresf. Maurit. p. 147 : Hnswell, Cat. 

 Austral. Crust, p. 60: F. Muller, Verh. Ges. Basel, VIII. 1886, p. 474: de Man, 

 Zool. Jahrb., Syst. VIII. 1894-95, p. 521 : Whitelegge, Mem. Austral. Mus. III. 

 1897, p. 137. 



Leptodius exaratus, var. sanguineus, Miers, P. Z. S. 1877, p. 134 j Ann. Mag. Nat. 

 Hist. (5) V. 1880, p. 234; Challenger Brachyura, p. 138: Cano, Boll. Soc. Nat 

 Napoli, III. 1889, p. 203. 



Lagostoma nodosa, Randall, Journ. Ac. Nat. Sci. Philad. 1839, p. 111. 



Chlorodius nodosus, Dana, Proc. Ac. Nat. Sci. Philad. 1852, p. 79, and U. S. 

 Expl. Exp. Crust, pt. I. p. 210, pi. xi. figs. 14a— g. 



Chlorodius edwardsi, Heller, Abh. zool.-bot. Ges. Wien, 1861, p. 10, and SB. Ak. 

 Wien XLIII. 1861, i. p. 336 : Hilgendorf in v. d. Decken's Reis. Ost. Afr. Ill, i. 

 p. 74. 



Xantho exaratus var. sanguinea, Ortmann, Zool. Jahrb. Syst. VII. 1893-94, 

 p. 447. 



Differs from Xantho (Leptodius) exaratus in the following particu- 

 lars : — 



(1) the carapace is more convex anteriorly, and the branchial 

 lobules also are more convex : 



(2) there are five teeth on the anterolateral margin, not includ- 

 ing the external orbital angle and a small denticle below it: 



(S) the postero-lateral border is a good deal shorter than the 

 chord of the antero-lateral border : 



(4) the front is distinctly narrower. 



In the Indian Museum are 123 specimens chiefly from the Andamans 

 and Laccadives, also from the Nicobars, Ceylon, and Persian Grulf. 



46. Xantho (Leptodius) crassimanus y A. M. Edw. 



Xantho crassimanus, A. Milne Edwards, Ann. Soc. Ent. France (4) VII. 1867 

 p. 267. 



Leptodius crassimanus, A. Milne Edwards, Nouv. Archiv. du Mus. IX. 1873, 

 p. 226, pi. xi. fig. 4 : Haswell. Cat. Austral. Crust, p. 61 : Muller, Verh. Ges. Basel, 

 VIII. 1886, p. 474 : de Man. Archiv. fur Naturges. LIII. 1887, i. p. 287, and Notes 

 Leyden Mus. XV. 1893, p. 284, and Zool. Jahrb., Syst. VIII. 1894-95, p. 522. 



Xantho exaratus var. crassimana t Ortmann, Zool. Jahrb. Syst. VII. 1893-94, 

 p. 448. 



Differs from both exaratus and sanguineus in the following particu- 

 lars: — 



(1) the two lobes of the front have the free edge not merely 

 emarginate, but deeply concave, so that the front appears to be formed 

 of four little teeth : 



(2) the carapace, anteriorly, is much more convex, the regions 

 are more convex and their areolae are more convex : 



(3) the fingers are not so broad at tip and not so sharply hollowed 

 out : 



