ZOOLOGY OF FERNANDO NORONHA. 
521 
which does not reach nearly so far as the anterior border of the 
first segment of the autennula, but a little beyond the ocular 
hoods, from which it is separated on each side by a deep sulcus. 
Ocular hoods not spined, but slightly produced in front. 
Antennular spine short, not reaching to the front margin of 
the first segment of the peduncle of the antemnila. Second 
segment of peduncle the longest of the three, the third the 
shortest. 
Antennal scale as long as peduncle of autennula, shorter than 
peduncle of antenna. Basal segment of antenna without a 
spine. 
Legs of first pair very unequal in size. Dactylus of larger 
manus closing horizontally, about half as long as the upper 
margin of the manus. The superior (outer) margin of the 
thumb furnished with two large teeth, of which the posterior is 
smaller, more slender, and with a blunt apex, the anterior having 
a rounded margin. 
Dactylus short, rounded. Dactylus and thumb very hairy. 
The manus simple, cylindrical, without constrictions or depres- 
sions, as long as the carapace and the two proximal segments of 
the antennular peduncle. Carpus deep from above downwards, 
rounded above, and not furnished Avith a tooth. Meros deep 
from above downwards, three-sided, flattened below ; upper 
margin produced in front into a conspicuous process. 
Smaller hand somewhat resembliug the larger, except that it is 
less twisted, less cylindrical, with dactylus and thumb straighter 
and relatively longer. Carpus less deep, and furnished on the 
upper inner margin with a distinct nodule. Meros less deep, 
with upper tooth scarcely conspicuous. 
In the second pair of legs the carpals are 2, 5, 4 and 3 and 1. 
The first, third, and fourth segments approximately equal in 
length, the fifth a little longer; the second as long as the third, 
fourth, and fifth together. In the third and fourth pairs of legs 
the carpus and meros are below furnished in front with a strong 
spur. 
Ten specimens. So far as I know, this species has not been 
hitherto recorded from the American coasts. Its occurrence has 
been mentioned in the Samoan Islands (Kingsley), Fiji Islands 
(Dana, Miers), and in Mauritius (Richters). 
LINN. JOURN. — ZOOLOGY, A r OL. XX. 
40 
