ZOOLOGY OF FERNANDO NORONHA. 521 



which does not reach nearly so far as the anterior boi'der of the 

 first segment of the anteunula, but a little beyond the ocular 

 hoods, from which it is separated on eacli side by a deep sulcus. 

 Ocular hoods not spiued, but slightly produced in front. 



Antennular spiue short, not reaching to tlie front margin of 

 the first segment of the peduncle of the anteunula. Second 

 segment of peduncle the longest of the three, the third the 

 shortest. 



Antennal scale as long as peduncle of anteunula, 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 with a tooth. Meros deep 

 from above downwards, three-sided, flattened below ; upper 

 margin produced in front into a conspicuous process. 



Smaller hand somewhat resembling 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, i and 3 and 1. 

 The first, third, and fourth segments approximately equal iu 

 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 iu front \vith 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 iij the Sauioan Islands {Kingsley), Fiji Islands 

 {Dana, Miers), and iu Mauritius (BieJiters). 



LINN. JOURN. — ZOOLOGY, VOL. XX. 40 



