308 Mr. E. J. Miers on Malaysian Crustacea. 



orbital tooth. M. setosus, M.-Edw., and M. japonicus, De 

 Haan, have the antero-lateral angles much less prominent 

 and acute. M. inermis, A. M.-Edwards, which may be 

 identical with this species, is represented as having the upper 

 margin of the hands sharp-edged, not rounded. 



Ocypode ceratophthalma (Pallas). 



Celebes, Macassar (an adult male) ; Batjan (an adult 

 male) . 



Ocypode cordimana (Latr.). 



Celebes, Macassar (a female). 



Gelasimus. 



There can be little doubt that many of the numerous 

 species of this large and difficult group have been founded on 

 insufficient characters, and will be reduced to synonyma when- 

 ever the comparison of sufficiently large series of specimens 

 of different ages and sexes shall have demonstrated the varia- 

 bility of the denticulation of the inner margins of the fingers 

 of the larger chelipede and of other characters that have been 

 employed in distinguishing the species. 



* Front narrow behveen the eyes. 



Gelasimus vocans (Linn.). 



Three males are in the collection, without definite indication 

 of locality. There is a strong triangular tooth near the distal 

 end of the upper margin of the arm in this species ; the 

 hand is strongly granulated externally, and has two very 

 strong granulated ridges on its inner surface ; the fingers are 

 robust and laterally compressed; there is always a strong 

 triangular lobe or tooth near the distal extremity of the lower 

 finger, and usually, but not invariably, a second between this 

 and the base. 



Gelasimus Marionis. 



Gelasimus Marionis, Desm. Consid. Crust, p. 124, pi. xiii. fig. 1 (1825); 



M.-Edw. Ann. Sci. Nat. (ser. 3) Zool. xviii. p. 145, pi. iii. fig. 5 



(1852) ; Hoffmann in Recherches faune Madagascar, Cr. p. 15, pi. iii. 



figs. 16-18 (1874); nee M.-Edw. Hist. Nat. Crust, ii. p. 53 (1837). 

 Gelasimus cultrimanus, White, P. Z. S. p. 84 (1847) ; Adams and 



White, Zool. Samarang, Cr. p. 49 (1848) ; M.-Edw. Ann. Sci. Nat. 



I c. p. 145 (1852). 



Batjan (two males). 



The principal character that distinguishes this species from 

 G. vocans is the absence of prominent lobes on the lower im- 



