Goree Island, Senegambia. Die 
Roux *, a species very insufficiently characterized ; but, to 
judge from the figure, the smaller chelipede differs from 
that of D. arenarius. Heller, however (¢. ¢.), unites it 
with that species. 
The carapace is smooth and naked, the cervical suture very 
distinct, the branchial regions but little dilated; the front 
between the eyes has a very slight rounded median promi- 
nence, but a strong lobe or tooth on the outer side of the eye- 
peduncles; the rostriform spine attached to the ophthalmic 
segment does not reach to the apices of the ophthalmic scales. 
The terminal postabdominal segment is somewhat transverse, 
and has its margins armed with numerous small spinules. 
The eye-peduneles are rather slender, and do not quite equal 
in length the width of the frontal margin; their basal scales 
are spinulose on their outer and distal margins, the distal 
spinules being the longest; the antennules have the terminal 
peduncular joint slender and longer than the preceding, the 
flagella very short; the second joint of the peduncle of the 
antenne is armed with a spinulose tooth, which does not reach 
to the apex of the eye-peduncle; the terminal joint of the 
peduncle is slender and longer than the preceding ; the joints 
of the rather short flagella are clothed on the underside with 
very long sete. The chelipedes are very unequal, the ght 
small and feeble, the left very considerably developed ; in 
the right the arm, wrist, and hand are of about equal thick- 
ness, the wrist and hand armed with a series of small spinules 
on their upper margins, and more or less hairy; fingers acute 
at the apices, and distinctly toothed on the inner margins; in 
the left chelipede the arm is very short and thick, with a 
few spiniform granules at the distal end of its upper and lower 
margins; wrist granulated, with a large concavity extending 
somewhat obliquely across the upper surface, its margins 
towards the inner side with stronger, almost spinuliform 
granules ; palm scarcely longer than broad, nearly flat, and 
very closely and evenly granulated on its outer surface, punc- 
tulated on the inner surface, its lower margim acute and 
strongly granulated ; fingers rather shorter than the palm, 
acute at their apices, lower finger rather strongly toothed on 
the inner margin, upper robust, arcuate, with strong, almost 
spinuliform tubercles on its upper margin. Second and 
third legs moderately robust, somewhat hairy, with the dactyli 
faintly longitudinally channelled on their outer surface, curved, 
and longer than the penultimate joints; the fourth legs are 
thicker than the fifth, with very small dactyli that scarcely 
* Crust. de la Méditerranée, pl. xiv. fig. 3 (1830). 
Ann. & Mag. N. Hist. Ser. 5. Vol. viii. 19 
