32 CARCINOLOGICAL STUDIES. 



toothed , which is not the case in Gelas. coarctatus. 

 Gelas. coarctatus is known from the Philippine Islands, 

 Australia and New Caledonia. 



13. Gelasimus forcipatus Ad. & White? 



(PL 3, fig. 9). 



Gelasimus forcipatus, Adams and White, Voyage of H. M. S. 

 Samarang, Crustacea, 1848, p. 50. 



It is not but with much hesitation that I refer a fine 

 male specimen from the Indian Archipelago , probably 

 from the shores of Celebes, to this species, which is only 

 known to me by the short latin diagnosis reproduced by 

 Milne Edwards (Ann. Sc. Nat. T. XVUI, 1852, p. 147). 



This crab closely resembles the described variety of Gelas. 

 arcuatus de Haan , in which the fingers of the larger hand 

 are but little longer than the palm ; it differs by the fol- 

 lowing characters. The lateral margins of the carapace are 

 a little more oblique, so that the external orbital 

 angles are more acute and directed a little more obliquely 

 outward than in the species of de Haan. The front presents 

 the same form and the orbits are equally transverse. The 

 lower wall of the latter, however, is ornamented near the 

 inferior margin with an accessory row of eight or 

 nine small granules, which are not found in Gelas. 

 arcuatus de Haan. The abdominal segments are compara- 

 tively a little less enlarged than in the Japanese 

 species. 



The larger hand has the same length, being almost once and 

 a half as long as the distance between the external orbital 

 angles. The palm , which is but little shorter than the fingers 

 and almost as high as long , appears comparatively a little 

 hio-her than the palm of Gelas. arcuatus. The outer surface 

 is densely granulated and the granulation is a little finer 

 and closer, the granules being somewhat smaller 



Notes from tlie Leyden Museum , "Vol. ^III. 



