1898.] A. Alcock — Car etiological Fauna of India. 159 



In the Indian Museum are 17 specimens, from the Andamans, Palk 

 Str. and Ceylon. 



This species has a strong likeness to Phymodius sculptus. 



Alliance II. Chlorodioida. 



Chlorodius. Chlorodopsis. 



Phymodias. Cyclodius. 



Chlorodids, A. Milne Edwards. 



Chlorodius, (part) Milne Edwards, Hist. Nat. Crust. I. 399. 



Chlorodius, (part) Dana, Silliinan's Amer. Jonrn. Sci. and Arts (2) XII. 1851, 

 p. 126, and U. S. Expl. Exp. Crust, pt. I. p. 204. 



Chlorodius, A. Milne Edwards, Ann. Sci. Nat. Zool. (4) XX. 1863, p. 283 ; Nouv. 

 Archiv. du Mus. IX. 1873, p. 212 ; Miss. Sci. Mex., Crust, p. 265. 



[Type Chlorodius niger (Forsk.)] 



Carapace depressed, flat, hexagonal, the regions faintly or not at 

 all demarcated, the surface smooth and almost unbroken, except some- 

 times on the branchio-hepatic region, near the antero-lateral border, 

 where there may be some broad transverse wrinkles. 



Fronto-orbital border more than three-fourths the greatest breadth 

 of the carapace. Front almost straight, faintly emarginate in the 

 middle line, extremely broad (between a third and half the greatest 

 breadth of the carapace), its outer angles separated from the supra- 

 orbital margin by a groove. 



Antero-lateral borders cut into four lobes or teeth, the first being 

 in very close approximation to the angle of the orbit. Postero-lateral 

 borders rather longer thau the antero-lateral. 



Orbit with two suture lines above, and one at the outer angle : 

 eyes on short thick stalks. 



Basal antennal joint large, extending upwards and outwards into 

 the gap between the front and the orbit ; the flagellum situated in the 

 crevice-like orbital hiatus. 



Merus of the external maxillipeds with the anterior border almost 

 transverse. 



Chelipeds unequal, long, more than twice the length of the carapace, 

 half or more of the arm projecting beyond the edge of the carapace ; 

 fingers large, broadened and deeply hollowed at tip (horse-shoe shaped). 



Legs never spiny, though the upper edge of the meropodites may 

 have a few spinules distally, and that of the following joints is sharply 

 granular. 



Abdomen of the male consisting of 5 joints, the 3rd-5th somites 

 being fused. 



