Goree Island, Senegambia. 213 
There is in the British-Museum collection a small specimen 
of this species from the Island of Ascension (h. Trimen, Esq.) 
in which carapace and legs are alike of a pale rose colour, an 
the fingers brownish, also specimens from Madeira (Rev. R. 
Boog Watson) in which the coloration is obliterated. 
It may be of interest to add that there is in the series ob- 
tained by Baron Maltzam a female bearing ova whose length 
does not reach 2 lines (4 millim.). 
X. rufopunctatus, A. M.-Edwards*, from Cape St. Vincent 
and Maio, is very briefly described, and I should be inclined 
to doubt its distinctness from X. melanodactylus; but not 
having examined the type, I do not venture to quote it as 
synonymous with the latter species. 
X. ertphioides, A. M.-Edwardst, also obtained from Cape 
St. Vincent, is at once distinguished by the strong spiniform 
tubercles of the carapace, chelipedes, and legs. ‘This species 
is still a desideratum in the collection of the British Museum. 
Xantho pilipes ? 
? Xantho pilipes, A. M.-Edwards, Ann. Soc. Entom. France, vii. p. 268 
(1867). 
There are in the collection numerous specimens of a species 
of Xantho, which I refer here with some hésitation, as Milne- 
Edwards’s diagnosis is in few words. According to the dis- 
tinguished French naturalist X. pilipes is nearly allied to X. 
rivulosus, but is distinguished by its narrower and less convex 
carapace, the much deeper depressions separating the branchial 
from the hepatic regions, the well-defined triangular antero- 
lateral marginal teeth, which are four in number, the slight 
prominence of the external orbital angle, and in the inferior 
and lateral regions of the carapace being covered with hairs. 
Breadth of carapace 40 millim., length 34 millim. In all 
these particulars the specimens betore me agree with X. pilipes. 
The front in these specimens, as in most species of the 
genus, is divided by a median notch into two broad and trun- 
cated lobes. On the postirontal region and on the front of 
the gastric region are slightly marked transverse elevations. 
The male postabdomen is five-jointed; the third to fifth seg- 
ments coalescent; the anterior legs (in the adult male) are 
very robust; merus or arm short, smooth; carpus or wrist 
with a small tooth on its mner margin; palm short, robust, 
smooth on its outer and inner surfaces, in all except the 
largest examples obscurely ridged on its upper margin ; 
* Rev. et Mag. Zool. (ser. 2), xxi. p. 409 (1869). 
+ Arch. Mus. H. N. iv. p. 58, pl. xvi. figs. 10-14 (1868). 
