1900.] A. Alcock — Car analogical Fauna oj India. 353 



smooth, the palm full with the granular 



ridges on the inner surface indistinct, and 



the fingers are not specially compressed... G. tetragonum. 



b. Front, measured as above, not a fifteenth 



the greatest breadth of the carapace : in 



the large male cheliped the upper surface 



of the wrist is granular and the fingers are 



remarkably compressed and blade-like : — 



a. In the large male cheliped the orests 



on the inner surface of the palm 



are moderately prominent, the 



dactylus is quite blade-like and the 



cutting- edge of the immobile finger 



is not much scallopped G. Marionis. 



jB. The crests on the inner surface of 

 the palm are extremely prominent, 

 the cutting edge of the dactylus is 

 not quite straight and that of the 

 immobile finger is scallopped into 



two large triangular lobes G, Marionis, var. 



nitidus. 

 ii. The arm of the large male cheliped ends in a 

 constricted lobe, but there is no sharp upstanding 

 tooth inside it on the inner border :— 



o. Front, measured as above, about a twelfth 

 the greatest breadth of the carapace; the 

 fingers of the large male cheliped have 

 tips that suggest tongs, owing to the 

 presence of an eularged tooth near the 

 tip : the meropodites of the last pair of legs 

 are nearly as foliaceous as those of the 



preceding pair G. acuius. 



b. Front, measured as above, not a fifteenth 

 the greatest breadth of the carapace : the 

 fingers of the large male cheliped end in 

 simple hooked tips : the meropodites of 

 the last pair of legs are not much broad- 



ened G. Dussumieri. 



2. On the lower wall of the orbit, inside of and parallel 

 with the middle third of the lower border of 

 that cavity, is a raised row of granules G. Urvillei. 



48. Gelasimns annulipes, Latr., Edw. 



? Cancer vocans minor, Herbst, Krabben, I. ii. 81, pi. i. fig. 10. 



Gelasimus annulipes, Milne Edwards, Hist. Nat. Crust. IT. 55, pi. xviii. fig. 

 10-13 ; and Ann. Sci. Nat., Zool., (3) XVIII. 1852, p. 149, pi. iv. fig. 15 : Dana, U. S. 

 Expl. Exp., Crust., pt. I. p. 317 : Heller, Novara Crust, p. 38 : Hilgendorf, in v. d. 

 Decken's Reis. Ost-Afr. III. i. p. 85, and MB. Ak. Berl. 1878, p. 803 : Hoffmann, 

 in Polleu and van Dam, Faun. Madagasc, Crust, p. 18 : Kossmann, Reise roth. 



