228 DE. J. G. DE MAJS" ON THE PODOPHTHALMOTJS 



Genus Diogenes, Dana. 



131. DioaENEs MEEauiENsis, n. sp. (PI. XV. figs. 4-6.) 



Pagurus miles, Milne-Edwards, in Annales des Sciences Nat. 2 ser. 

 t. vi. p. 284, pi. xiv. fig. 2. 



Pagurus miles, Milne-Edwards, Hist. Nat. Crustaces, t. ii. p. 235. 



Diogenes miles, Dana, United States Explor. Exp., Crustacea, pi. xxvii. 

 fig. 9. 



Nee Cancer miles, Herbst, Krabben und Krebse, t. ii. S. 19, Taf. xxii. 



fig. 7. 



Two fine specimens were collected, a male without definite 

 locality and a female from Elphinstone Island Bay. The latter 

 specimen inhabits the shell of an JSburna. 



As has been observed by Mr. Miers, the species which Herbst 

 figured as Pagurus miles is certainly diff'erent from the true 

 Cancer miles of Fabricius, and even from the Pagurus miles of 

 Milne-Edwards and Dana. 



Although Diogenes merguiensis appears to be identical with 

 the species described fifty years ago by Milne-Edwards as Pa- 

 gurus miles, I nevertheless propose to describe the anterior part 

 of the cephalothorax and the legs, as some details of structure 

 distinctive of these parts has not been mentioned by Milne- 

 Edwards. I would first direct attention to the circumstance that 

 each of the transverse elevated lines with which the upper surface 

 of the cephalothorax is covered in front of the cervical suture is 

 ornamented anteriorly with a row of a few short stiff hairs ; in the 

 same manner, all the more or less acute tubercles and spinules 

 which are found on the chelipedes and on the joints of the other legs 

 are piJiferous, being provided anteriorly with transverse rows of 

 similar short, stiff hairs, each row consisting of about five to 

 ten hairs. The frontal region and the peduncles of the eyes 

 and of the antennae of these specimens tolerably well agree with 

 the figure published by Milne-Edwards. The rostrum is very 

 acute, spinulose, and projects a little beyond the level of the 

 ophthalmic scales. The ophthalmic scales, which are compara- 

 tively much larger in this species than in Diog. miles, Eabr., are 

 subtriangulate and denticulate along their anterior margin ; the 

 median tooth, at the internal angle of this margin, is much 

 larger than the others, which gradually diminish in size towards 

 the lateral angle, and the upper surface of each scale is covered 

 with a piliferous, slightly elevated line. The eye-peduncles scarcely 

 project beyond the penultimate joints of the outer and inner 



