Goree Island, Senegambia. 265 
nations in the lateral margins. The eyes are contained in 
small circular orbits, whose upper margins are marked by a 
fissure. Antennules transverse ; the minute antenne are also 
placed almost transversely, and occupy the narrow inner 
orbital hiatus. Maxillipedes with large ischium and elongate 
triangulate merus jot; exognath stout, with its exterior 
margin curved, and apex (which does not. reach quite to the 
distal end of the merus) rounded. Chelipedes robust, of mode- 
rate length; merus or arm with numerous small granules at 
its proximal end on its upper and under surfaces, the margins 
also granulated ; carpus smooth, convex; palm little longer 
than broad, convex on its inner and outer surfaces, its upper 
margin acute, its inferior margin rounded ; fingers but little 
shorter than the palm, curved at the apices and denticulated 
on the inner margins. Ambulatory legs slender, short; 
dactyli longer than the penultimate joint. Colour (in spirit) 
more or less slaty or pinkish. Length of the largest example 
(a male) little over 7 lines (15 millim.), breadth about 
64 lines (nearly 14 millim.); length of chelipede (when ex- 
tended) nearly 1 inch (25 millim.). In the smallest example 
(a female) the length of the carapace is about 4 lines 
(9 millim.). 
Five males and females are retained from Baron Hermann- 
Maltzam’s collection. 
From the preceding species P. levidorsalis is distinguished 
by the absence of the lateral marginal crest, not to speak of 
other characters. It is distinguished from most of the other 
species of Philyra by its smooth and somewhat polished cara- 
pace and shorter robust chelipedes—from the Australian P. 
orbicularis, Bell, by the lateral marginal line of granules not 
being continued over the posterior margin, by the absence of 
a tubercle on the male postabdomen, smaller granules of the 
arms, and other characters. 
Ila spinosa, sp.n. (Pl. XV. fig. 3.) 
This very interesting species has the subglobose body 
covered with small granules, which, however, are less nume- 
rous and crowded than in J. nucleus. ‘There is a short spine 
on the pterygostomian region, and two long somewhat curved 
spines on the postero-lateral margins of the carapace, in place 
of the short postero-lateral spines of J. nucleus; also two 
shorter somewhat triangulate and compressed spines on the 
posterior margin, occupying the position of the rounded pro- 
minences of J. nucleus. In the form of the rostrum, post- 
abdomen, and the thoracic limbs this species very nearly re- 
