236 DE. J. G. DE MAK OH" THE PODOPHTHALMOTIS 



and smaller than in D. merguiensis. Both species very nearly 

 agree in tlie 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 asinZ). 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 also 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 JD. 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, Pabr., as already observed, there is only 

 one row of spinules on the dactylopodite. In D. merguiensis 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 ayaetjs. Seller. 



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 JVassa, the fourth in a 

 young Stromhus-shell, the fifth in a Cerithium. 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 iVflssa-shellj 



