168 
GAMMARIDiE. 
AM PH IPOD A . PH OXIDES. 
NATATORIA. 
MONOCULODES STIMPSONI. 
Specific character. Pleon not carinated ; thighs of the sixth pair of legs 
not plumigeous. 
Length, 5 S o inch. 
Monoculodes Strmpsoni. Spence Bate, Cat. Amph. Crust. Brit. Mus. 
p. 105, pi. xvii. fig. 3. 
The back of the animal has no perceptible carina. 
The head is advanced and depressed, but scarcely so 
much curved as in M. carinatus. The eye is undefined, 
and situated above, and rather in advance of, the point 
where the antennae articulate with the head. The su- 
perior antennae reach rather beyond the peduncle of the 
inferior; the first joint of the peduncle extends as far 
as the extremity of the head; the second joint is 
rather more than half the length of the first, and much 
slighter; the third joint is small, being scarcely a third 
the length of the second ; the flagellum is slender, and 
scarcely the length of the peduncle. The inferior pair 
of antennae are one- third longer than the superior, and 
reach as far as the seventh segment of the body ; the 
first two joints are covered by the coxae of the first pair 
