236 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
and smaller than in D. merguiensis. Both species very nearly 
agree in the character of the right chelipede; this leg likewise is 
very hairy and piliferous, but the external surface of the hand 
bears smaller and less acute granules than in D. merguiensis. 
The other legs are almost similar in both species, the joints pre- 
senting the same form and size asin D. merguiensis. The distin- 
guishing characters are the following :— 
The outer surfaces of the joints, as on the larger hand, are 
covered with more numerous, smaller, and less piliferous granules 
than in D. merguiensis, and their upper margins are algo less 
hairy. In comparing the right third pair of legs of both species 
with one another, I observe that the upper margin of the mero- 
podite of D. miles is armed with a row of more numerous and 
larger spinules than in D. merguiensis, and that the upper margin 
of the dactylopodite in the Mergui specimen of D. miles presents 
two rows of small spinules, of which those of the inner row are 
a little larger than those of the outer. These rows extend beyond 
the middle of the dactylopodite. In the larger and typical 
specimen of D. miles, Fabr., as already observed, there is only 
one row of spinules on the dactylopodite. In D. mergwiensis there 
is a single but much shorter row of acute granules along the 
proximal third of the dactylopodite. The outer surface of the 
dactylopodite of D. miles is longitudinally sulcate, and the inner 
surface is covered with a few acute granules at its base. 
Both species probably grow to the same size, and their carapace — 
and legs have similar dimensions. 
133. Diogenes avarus, Heller. 
Diogenes avarus, Heller, Crustaceen der Novara-Reise, p. 83, Taf. vii. 
fig. 2. 
Six specimens were collected in Elphinstone Island Bay. Three 
were found in the shell of a species of Massa, the fourth in a 
young Strombus-shell, the fifth m a Cerithiwm. The sixth has 
been removed from its shell; it is very young, and the carpo- 
podite and the hand of its larger chelipede are not yet as elongated 
as in the adult. 
Diogenes avarus has been recorded from the Nicobar Islands. 
134, DIOGENES, sp. 
The collection contains yet a fourth species of this genus 
represented by a very young specimen, inhabiting a Nassa-shell, 
