ZOOLOGY OF FERNANDO NORONHA. 523 



longer tbau the autennular peduuele, shorter than the peduncle 

 of the antenna. Basal segment o£ antenua not provided with a 

 spine. 



Legs of fii'ist pair absent. 



Carjjals of the second pair differing upon the two sides, on the 

 right side the fifth segment being longer than the second, and on 

 the left side shorter. In each case the first is tlie longest, and 

 the third and fourth the shortest. 



Carpus and meros of third and fourth pairs not produced 

 below into a tooth. 



Dactyli of third, fourth, and fifth pairs simple. 



Alpheus, sp. 



(Too mutilated for identification.) 



Carapace furnished in front with a short rostrum, w^hicli does 

 not project as far as the middle of the first segment of the 

 peduncle of the antennula, and is separated by a depression on 

 each side from the ocular hoods. Each ocular hood furnished 

 with a spine. Antennular spine short, sharp, not reaching to 

 the front margin of the basal segment of the peduncle. Second 

 segment of the peduncle the longest, the first and third approxi- 

 mately equal in length. Antennal scale as long as antennal 

 peduncle, a little longer than antennular peduncle. Basal seg- 

 ment of antenua furnished with a long, sharp spine, which pro- 

 jects as far as the middle of the second segment of the antennular 

 peduncle. 



Eirst and second pairs of legs absent. Carpus and meros of 

 third and fourth pairs not produced below in front into a strong 

 process. Dactyli of third, fourth, and fifth pairs bifid. 



[The Alphei were taken in numbers from the holes in which 

 they hid by breaking up the coral-reef. — S. iV". i?.] 



Family Pen^id^. 



(xenus Stenopusculus, Bichters. 

 1880. Stenopusculus, Richters, Beitriige zur Meeresfauna der Iiisel Mau- 

 ritius und der Seychellen, von Mobius, Richters und v. Martens, p. 167. 



Stenopusculus spinosus, n. sp. 



? Syn. Stenopusculus crassimanus, Richters, t. c. p. 168, pi. xviii. figs. 

 27-2.9. 



Upper portion of cephalothorax sparsely spiued ; spines in 



40* 



