CARCINOLOGICAL STUDIES. 23 



a prominent tooth immediately before 



the extremity. annulipes Latr. 



8. Gelasimus vocans M. E. 

 (PL 2, fig. 5). 



Gelasimus vocans^ H. Milne Edwards, in: Annales des Sciences Natu- 

 relles, T. XVIII, 1852, p. 145, PI. Ill, fig. 4. 



Gelasimus vocans ^ de Man, in: Notes from the Leyden Museum, 

 Vol. II, 1880, p. 67. — Miers, Report on the Brachyura ot the Chal- 

 lenger Expedition, 1886, p. 242. 



I have before me the following specimens , about which 

 I will remark the following. 



Three male specimens collected at Atjeh , Sumatra, from 

 my own collection. They apparently belong to the typical 

 form of this species, and I have figured the larger hand of one 

 of tbem (fig. 5). The inner margin of the immobile finger 

 is armed with two triangular, prominent teeth, 

 of which the distal one is slightly larger tban the other, 

 and with a third very small one quite at the base ; the 

 mobile finger presents two small prominent teeth near the 

 base and a third still smaller one which is found a little 

 before the prominent distal tooth of the index. The two 

 crests on the inner surface of the palm are strongly developed. 



Secondly a male from the Island of Morotai. This spe- 

 cimen only differs from the foregoing ones by the two promi- 

 nent teeth of the lower finger, these being about of the same 

 form and size. 



In the third place an adult male and an ova-bearing 

 female from the Fiji Islands, and two somewhat younger 

 males and a female from the Samoa Islands. In these spe- 

 cimens the larger hand of the male appears a little 

 more elongate than in the Atjeh-specimens, i. e. slightly 

 longer in proportion to the height, and the lower margin 

 is less strongly arcuate. The middle one of the three teeth 

 of the immobile finger is much less prominent, more or 



rMoLes froai ttie Lejden IVIaseuLu , Vol. XIII. 



