Goree Island, Senegambia. 263 
Gelasimus perlatus, Herklots, Addit. Faun. Carcin, Afric. Occid. p. 6, 
i i. fig. 3 (1851); M.-Edwards, Ann. Sci. Nat. ¢. ¢. p. 151 (1852) ; 
ilgendorf, Monatsber. der Akad. Wissensch. Berlin, p. 806 (1878) ; 
Kingsley, ¢. ¢. p. 153 (1880). 
Here are referred three very small specimens in the collec- 
tion, which I was at first disposed to regard as a distinct 
species; the largest only measures about 3 lines (7 millim,) 
in length and 4 lines (83 millim.) in breadth. Not only do 
they differ from all the specimens of G’. tangieri I have seen 
in their much smaller size, but also in the small number of the 
granules of the carapace, of which there are scarcely any on 
the median portions, and in the relatively much shorter fingers 
of the larger chelipede, which are no longer than the palm. 
The hand, when the fingers are closed, is nearly ovate; and 
there are scarcely any granules on its inner surface. An ap- 
proach to these specimens is exhibited, however, in an example 
from Sierra Leone of rather small size; length of carapace 
52 lines (12 millim.). 
This species occurs at various localities on the northern and 
western coasts of Africa, as noted by Mr. Kingsley in his 
monographic list of the species of the genus above cited; and 
I may add, as a fact of much interest, that there are speci- 
mens from the West Indies (frazer) in the British-Museum 
collection which are not to be distinguished specifically from 
the African examples. 
Philyra cristata, sp.n. (Pl. XV. fig. 1.) 
In this species the body is depressed, suborbiculate ; cara- 
pace minutely punctulated above, produced at the margins into 
a thin continuous crest that surrounds the body; the regions 
are not distinguishable; the intestinal region, behind the 
posterior marginal crest, is also strongly cristate. The front 
has its anterior margin straight, and does not project anteri- 
orly so much as the front of the buccal cavity. Orbits small; 
the fissures of the upper margin are very indistinct, and have 
a wide hiatus at their exterior and interior angles, and no 
lower margin other than that formed by the projecting rim of 
the buccal cavity. Postabdomen with all the joints except 
the first and last coalescent, of the male nearly half as broad 
as the sternum, concave on the sides in the middle, with a 
small tubercle on the penultimate joint, terminal joint much 
smaller than the preceding. Hyes small, black. Antennules 
lodged in horizontal fossettes. Antenne scarcely distin- 
guishable. Inferior surface of the body smooth and minutely 
punctulated. Outer maxillipedes with the triangular merus 
as long as the ischium; exognath very broad, with its 
