AMPHITHOE GAMMAllOIDES. 
427 
AMPHIPOBA. P0D0CER1DES. 
NAT ATOM A. 
AMPHITHOE GAMMAROIDES. 
Specific character. Eyes small, round, and black. Superior antennae 
shorter than the inferior. Second pair of gnathopoda larger than the first ; 
propodos subquadrate. 
Length. 5 inch. 
Amphithoe Gammaroides. Spence Bate, Cat. Amph. Brit. Mus. p. 235, 
pi. xli. fig. 4. 
Pleonexes Gammaroides. Spence Bate, Ann. Nat. Hist. 2 ser. vol. xix. 
p. 147. White, Pop. Hist. Brit. Crust, 
p. 199. 
The eyes of this species are very small, round, and 
black. The superior antennae are more than half the length 
of the animal. The first joint of the peduncle is longer 
than the head, the second joint is longer than the first, 
and the third is not half the length of the second ; the 
flagellum, which is imperfect in our typical specimen, 
is about the length of the peduncle. In the inferior 
antennae the antepenultimate joint of the peduncle ex- 
tends to half the length of the first joint of the upper ; 
the penultimate as far as the extremity of the second 
joint of the upper; while the ultimate is nearly as long 
as the two preceding ; and the flagellum is about the 
same length as the last joint of the peduncle, and there- 
fore reaches beyond the extremity of the superior, 
unless the flagellum of the latter be preternaturally long. 
It was on account of the greater length of the inferior 
to the superior antennae that the original describer first 
