514 MR. H. N. RIDLEY ON THE 



correctness of the identification of the specimens that I have re- 

 ferred to that sjDecies, I have thought it desirable to publish a 

 description of them which may, so far as is possible, furnish a 

 test as to the accuracy of the conclusion that has been arrived at. 



Carapace and upper surface of limbs pubescent. Width of 

 carapace approximately equal to its length. Carapace smooth, 

 punctured ; its anterior half furnished laterally with a small, sharp, 

 upstanding spine. From this spine there extends backwards into 

 the posterior half of the carapace a granular ridge which serves 

 to separate the superior portion of the carapace from the lateral 

 portion. The frons is slightly depressed and is marked off from 

 the hinder portion of the carapace by a distinct ridge, which runs 

 transversely between the posterior margins of the orbits. In the 

 middle this ridge is interrupted by a conspicuous sulcus, which 

 extends to the central lobe of the frons. This lobe is rounded 

 anteriorly ; its lateral margins are nearly vertical to the remainder 

 of the anterior margin of the frons and approximately parallel to 

 the superior margin of each orbit, which is the lateral border of 

 the frons. The anterior half of this lateral border marked, off 

 from the posterior half by being at a conspicuously lower level. 



Basal segment of antenna furnished on the inner side with a 

 small acute spine. 



Upper surface of chelipede covered with more or less squami- 

 form granules ; lower surface smooth. Anterior margin of upper 

 surface of meral segment produced into a sharp process ; beneath 

 this, on the under surface, is a sharp spine, wliich may be bifid ; 

 posterior margin of upper surface spined. Anterior margin of 

 upper surface of carpal segment furnished with three or four 

 sharpened processes; posterior margin spined and produced 

 distally into a spined process. The middle of the uj^per surface 

 bearing a longitudinal series of larger squamiform tubercles. 

 Inferior border of anterior surface of carpal segment granular ; 

 rest of the surface smooth. Anterior and posterior margins of 

 manus and dactylus granular. A slightly curved series of larger 

 squamiform granules extending along the upper surface of the 

 manus from its carpal to the middle of its dactylar joint. Con- 

 tinuous with this is a series running from the base to the apex 

 of the dactylus. Apex of dactylus and of thumb smooth and 

 curved. 



Anterior and posterior margins of meral segments of second, 



