158 



GAMMARID^. 



AMPHIPODA. 



NATAWRIA. 



PHOXIDES. 



WESTWOODILLA HYALINA. 



Specific Character. Eye prominent. Superior antennre storter than tlie 

 peduncle of the inferior. In the microscopic structure of the skin there is 

 no central spot or nucleus to each cell. 



Length A inch. 



WesticoodlUa hyalina. 



Spence Bate, Cat. Amph. Brit. Mus. p. 103, 

 pi. xvii. fig. 5. 



This animal bears a considerable resemblance to the 

 last species, but differs in several more or less important 

 details. The eye is more clearly defined in form, and 

 situated so closely beneath the skin, that it is raised 

 upon the outer surface. It is long-ovate, and situated in 

 the centre of the hood-like projection of the head. The 

 superior antennae are a little longer than the head, and 

 have each joint of the peduncle gradually decreasing in 

 length ; the flagellum, which only consists of five or six 

 articuli, is about the length of the last two joints of the 

 peduncle. The inferior antennae have the peduncle 

 longer than the superior; the last three joints are sub- 

 equal in length, and the flagellum, which consists of five 



