338 
GAMMARIBiE. 
Brit. Edrioph. Crust. Ann. Nat. Hist. 
2 ser. xix. p. 144. Cat. Amph. Crust. 
Brit. Mus. p. 182, pi. xxxiii. fig. 2. 
White, Pop. Hist. Brit. Crust, p. 184. 
Bruzelius, Skand. Amph. Gramm, p. 56. 
Gammarus incequimanus. Spence Bate, Ann. Nat. Hist. 2 ser. xix. 
p. 145. White, Pop. Hist. Brit. Crust, 
p. 185. 
The fourth segment of the tail is posteriorly armed 
with a small central tooth, and the fifth with two very 
minute ones. The eyes are almost round. The superior 
antennae are rather more than half the length of the 
animal, terminating in a flagellum not so long as the 
peduucle, and furnished with a short triarticular second- 
ary appendage. The inferior antennae have the peduncle 
as long as that of the superior, but the flagellum is much 
shorter than the flagellum of the superior. The first 
pair of legs have the hands but slightly dilated, whilst 
those of the second are very large. In the second pair 
the palm is convexly produced at the extremity to an 
extent equal to the length of the finger, and rounded off 
obtusely at the inferior angle, with which it lies at a right 
angle ; the inferior margin is straight and furnished 
with fasciculi of hairs, while the upper is arcuate and 
clean ; the inner side of the hand is concave : and the 
short curved and pointed finger impinges against the 
middle of the joint (as shown in the vignette) instead of 
against the palm or anterior margin as is usually the case ; 
the outer surface of the hand is convex ; and when the 
organs are at rest they act the part of a boxlike shield 
for the protection of the oral and anterior appendages. 
The three posterior pairs of legs are strong and fringed 
with hairs ; the thighs being slightly serrated upon the 
posterior margins. The ante and penultimate pairs of 
caudal appendages are short, especially the latter, whilst 
the ultimate (which were broken off in the specimen 
