272 Mr. E. J. Miers on Crustacea from 
sternal sulcz in the female are not approximated, and terminate 
in a tubercle between the bases of the second pair of legs. 
The postabdomen in both sexes is seven-jointed ; the terminal 
segment in the male is small, rounded at its distal end, and 
armed with a short rounded lobe or spine at its proximal and 
lateral angles. As is usual in the group, no septa separate 
the antennules from the antennez and the antenne from the 
eyes. The first antennal joint is short, the second robust. 
The outer maxillipedes have the merus as large as the 
ischium, with the next joint inserted at its antero-internal 
angle; exognath stout, and reaching nearly to the extremity 
of the merus. ‘The chelipedes (in the two specimens exa- 
mined) are subequal, moderately robust, and densely pubes- 
cent, except at the finger-tips; arm trigonous, carpus with 
two small tubercles on its upper and outer surface near the 
articulation with the merus; palm nearly twice as long as 
broad, in the male clothed with longer hair on the inner and 
under surface; fingers somewhat obliquely deflexed, dentated, 
and closely meeting along their inner edges, excavated, naked, 
and white at the apices. Second and third legs robust, not 
tuberculated, fourth and fifth legs subdorsally elevated ; 
penultimate joint in both terminating in a spiniform process, 
against which the terminal claw closes ; fifth legs much more 
slender and feeble than the fourth. Colour (in spirit) 
brownish. Length of the largest (a male) to tip of spines of 
rostrum about 1 inch 5 lines (nearly 36 millim.), breadth 
1 inch 6 lines (88 millim.). The smaller example is a female 
with ova. 
The form of the spines of the rostrum, together with the 
small dentiform teeth of the antero-lateral margins, appear to 
distinguish this species from its congeners. 
Diogenes varians. 
Pagurus varians, Costa, Fauna di Napoli, Cr. p. 9, pl. ii. fig. 2 (1838). 
P Pagurus arenarius, Lucas, Anim. Artic. in Expl. Sci. Algérie, Crust. 
p. 33, pl. iii. fig. 7 (1849), 
? Diogenes arenarwus, Stimpson, Proc. Ac. Nat. Sci. Phil. p. 283 (1858). 
Diogenes varians, Czerniavsky, Materialia ad zoograph. ponticam com- 
paratam, p. 127 (1868); Heller, Crust. siidl. Europa, p. 170, pl. v. 
fios. 13, 14 (1868). 
Here are referred with some doubt a series of specimens inha- 
biting sponge-incrusted shells of the genera Oliva, Turritella, 
and Clavatula. As M. Costa’s description and figure leave 
several points undetermined, the following description is given 
of the specimens from Goree Island. {f may add that D. 
varians may itself be identical with the Pagurus pugilator ot 
