ÖARCINOLOGICAL STUDIES. 33 



than in the species of the » Fauna Japonica". The upper 

 border of the palm is margined and the lower border 

 granulated about in the same manner in both species. The 

 two crests on the inner surface of the palm are coarsely 

 granulated in both forms. As I already observed, the fin- 

 gers are scarcely longer than the palm and both are faintly 

 furrowed in a longitudinal direction on their outer surface. 

 They are regularly tapering and present about the same 

 form as in the described variety of Gelas. arcuatus] the 

 mobile finger is granulated at the proximal end of its 

 upper margin. The inner margin of the dactylus is similar 

 to that of the other species and armed with fourteen 

 or fifteen granules , of which one in the middle and a few 

 near the extremity are a little more prominent. The lower 

 finger or index is scarcely concave at the base of its outer 

 surface and armed along its inner margin with about the 

 same number of granules; one of them, situated in the 

 middle, is somewhat prominent and tooth-like, and a few 

 at the extremity are also a little more prominent. These 

 two prominences are, however, much less deve- 

 loped than in Gelas. arcuatus. The ambulatory legs, 

 finally , have about the same form. 



The upper surface of the cephalothorax of our specimen , 

 preserved in spirits , is green anteriorly , violet posteriorly 

 and on the lateral sides. The hand is of a uniform reddish tinge. 



I cannot identify this species with Gelas. dubius Stimpson 

 from the Loo Choo Islands , because the orbits are not 

 more oblique than those of Gelas. vocans, and because the 

 lateral margins are distinct. 



Gelas. acutus Stimpson (pi. 3, fig. 10) differs by the 

 ceplialothorax being more strongly narrowed backwards, 

 by the nearly straight and extremely oblique lateral mar- 

 gins, and by the absence of an accessory row of granules 

 on the walls of the orbits. 



Measurements : <ƒ 



Distance between the external orbital angles . . 34 mm. 

 Length of the cephalothorax (front included). . 20 » 



Notes frova. tlie Leyden JMu^eum, Vol. JCIII. 



