74 
GAMMARIDAL 
AMP HI POD A. 
NATATOBTA. 
LYSIANASSIDES. 
LYSIANASSA COSTtE. 
Specific character. Inferior antennae not longer than the superior, the 
flagellum of each being shorter than their respective peduncles. 
Length .]$ of an inch. 
Lysianassa Costce, Edwards, Ann. des Sc. Nat. t. xx. p. 365. pi. x. fig. 17. 
Hist, des Crust, t. iii. p. 21. Spence Bate, Report 
Brit. Assoc. 1855, p. 58. Ann. Nat. Hist. (1857) xix. 
138. Cat. Amphipoda, Brit. Mus. p. 69. pi. x. fig. 
11. White, Pop. Hist. Brit. Crust, p. 167. 
Oammarus glaber , (Spinola MS.) White, Cat. Brit. Mus. (Crustacea), 1847. 
The eyes are reniform, of a brown colour, and mode- 
rately large. The superior antennae are not longer than 
the head and the first two segments of the body, while 
the peduncle is scarcely longer than the head, and the 
flagellum scarcely as long as the peduncle, the former 
consisting of six or seven articuli, and the secondary 
