228 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
Genus Diogenes, Dana. 
131. DIOGENES MERGUIENSIS, n. sp. (Pl. XV. figs. 4-6.) 
Pagurus miles, Milne-Edwards, in Annales des Sciences Nat. 2 sér. 
t. vi. p. 284, pl. xiv. fig. 2. 
Pagurus miles, Milne-Edwards, Hist. Nat. Crustacés, t. u. p. 235. 
Diogenes miles, Dana, United States Explor. Exp., Crustacea, pl. xxvil. 
fie 2. 
New Cancer miles, Herbst, Krabben und Krebse, t. ii. S. 19, Taf. xxi. 
He. 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 Hburna. 
As has been observed by Mr. Miers, the species which Herbst 
figured as Pagurus miles is certainly different 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 Muilne- 
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 piliferous, 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 antenne 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, Fabr., 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 
