514 
MK. H. N. RIDLEY ON THE 
correctness of the identification of the specimens that I have re- 
ferred to that species, 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. Prom 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. 
TJpper 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, which 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 upper 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, 
