160 A. Alcock — Carcinological Fauna of India. [No. 1, 



Key to the Indian species of Chlorodius. 



I. Carapace with the regions faintly marked, transversely 

 wrinkled near the anterolateral borders ; four distinct 

 teeth (exclusive of the orbital angle) on the antei'o- 



lateral border ... Q. niger. 



II. Carapace with a perfectly smooth unbroken surface ; 

 first lobe of antero-lateral margin almost obsolete, the 

 third the most distinct of all C, Isevissimus. 



84. Chlorodius niger (Forsk.) Riippell, A. M. Edw. 



Cancer niger, Forskal, Descr. Anim. p. 89. 



Chlorodiws niger, Ruppell, 24 Krabben roth. Meer. p. 20, pi. iv. fig. 7 and pi. vi. 

 fig. 14: Milne Edwards, Hist. Nat. Crust. I. 401: Dana, U. S. Expl. Exp. Crust, 

 pt. I. p. 216, pi. xii. figs. 5a-c : Stimpson, Proa Ac. Nat. Sci. Phila , 1858, p. 33 : 

 Heller, SB. Ak. Wien, XL1II. 1861, i. p. 335, and Novara Crust, p. 18 : A.Milne 

 Edwards, Nouv. Archiv. du Mus. IV. 1868, p. 71, and IX. 1873, p. 214 : Kossmaun, 

 Keise roth. Meer. Crust, p. 34 : Miers, Ann. Mag. Nat. Hist. (5) V. 1880, p. 234; 

 and P. Z. S. 1884, pp. 10, 11 ; and Zool. H. M. S. Alert, pp. 183, 215, 517, 531 : 

 de Man, Notes Leyden Mus. II. 1880, p. 174, III. 1881, p. 98, and Archiv. fur 

 Naturges. LIU. 1887, i. p. 279, and Journ. Linn. Soc, Zool., XXII. 1887-88, p, 32 ; 

 and Zool. Jahrb. Syst. VIII. 1894-95, p. 519 : Richters in Mobius Meeresf. Msmrit. 

 p. 147 : Haswell, Cat. Austral. Crust, p. 62 : J. R. Henderson, Trans. Linn. Soc, 

 Zool., (2) V. 1893, p. 361 : Orfcmann, Zool. Jahrb. Syst. VII. 1893-91, p. 465, and 

 in Semon's Forschungsr. (Jena. I)enk. VIII.) Cruse, p. 51. 



Chlorodius hirtipes, White, P. Z. S. 1848, p. 226; Ann. Mag. Nat. Hist. (2) II. 

 1848, p. 286 ; and Adams and White, Samarang Crust, p. 49, pi. xi. fig. 4. 



Chlorodius cytherea, Dana, Proc. Ac. Nat. Sci. Phila. 1852, p. 79, and CJ. S. 

 Expl. Exp. Crust, pt. I. p. 213, pi. xii. figs. 2a-c : Stimpson, Proc. Ac. Nat. Sci. 

 Phila. 1858, p. 33. 



Chlorodius nebulosws, Dana, Proc. Ac. Nat. Sci. Phila. 1852, p. 80, and U. S. 

 Expl. Exp. Crust, pt. I. p. 214, pi. xii. fig. 3. 



Chlorodius depressus, Heller, Abh. zool.-bot. Ges. Wien, 1861, p. 11 ; and SB. Ak. 

 Wien, XLIII. 1861, p. 338 : Hilgendorf in v. d. Decken's Reisen Ost-Afr. III. i. p. 74. 



Carapace hexagonal, depressed : gastric region delimited by faint 

 grooves and subdivided into from 3 to 5 indistinct areolas by still 

 fainter grooves ; anterior part of branchio-liepatic region, just inside 

 the antero-lateral margin, with one or two low broad transverse wrink- 

 les : the surface of the carapace quite smooth (non-granular). 



First lobe of the antero-lateral border small, almost confluent 

 with the rounded external orbital angle ; last two lobes usually ending 

 in procurved spine-like points. 



Ciielipeds, in both sexes, twice or more the length of the carapace, 

 usually quite smooth to the naked eye ; a tubercle or spine on the 

 anterior edge, and a little crenulation (not always present) on the 

 posterior edge of the arm ; inner angle of wrist strongly pronounced ; 

 fingers stout, a good deal arched, markedly spoon-like at tip. 



