AORA GRACILIS. 



281 



AMPniPODA, 



NATATORIA. 



GAMMARIDES. 



AORA GRACILIS. 



Specific character. Basos of the first pair of gnathopoda having the 

 anterior margin without a tooth. Finger with the interna] margin serrated. 

 Length \ inch. 



Lonchomerus gracilis. 



Lalaria gracilis. 

 A ora gracilis. 



Spexce Bate, Rep. Brit. Assoc. 1855. Ann. 



Nat. Hist. 2 ser. xix. p. 143. "White, Pop. 



Hist. Brit. Crust, p. 180. 

 Spence Bate, Ann. Nat. Hist. 2 ser. xx. p. 525, 



1858. 

 Spence Bate, Cat. Amph. Brit. Mus. p. 160, 



pi. xxix. f. 7. 



The body of the animal is long and slender. The 

 eyes are small, round, and black. The superior antennae 

 are more than half the length of the animal, the flagellum 

 forming more than half of the organ : the secondary 

 appendage is slender. The inferior antenna? are scarcely 

 more than half the length of the superior ; and the 

 flagellum is very short, being scarcely half the length of 

 the last joint of the peduncle of the inferior. The first 

 pair of hands are very long and slender, having the 

 second joint long, and unfurnished with a tooth-like 

 process, thus differing from Aora typica, the South 



