28 
ORCHESTIIDJE. 
Pulex inarinus, Baster, Opusc. Subs. t. 8, f. 7, 8. 
Cancer gammarellus , Herbst. ii. 129, t. 36, f. 2, 3. 
The eyes are black, irregularly round, moderately 
large, and situated near the top of the head. The 
superior antennae are as short as in Talitrus locusta, 
reaching scarcely to the extremity of the penultimate 
articulation of the peduncle of the inferior pair. The 
inferior pair of antennae in full-grown males are scarcely 
half as long as the animal, they have the first two 
joints fused into the frontal wall of the head ; the last 
joint of the peduncle is longer than the preceding, and 
the articulated extremity is as long as the peduncle. The 
first pair of legs are small, with the penultimate joint 
shorter than the antepenultimate, and the inferior angle 
of each is developed into a scaly protuberance ; the palm 
is short, convex, and edged with a row of single hairs : 
the terminal joint or finger is sharp, scarcely reaching to 
the extremity of the protuberance. The second pair of 
legs have the coxae more largely developed, and almost 
covering those of the first pair: the penultimate joint is 
large and quadrate, being almost as broad as long: the 
palm is convex, and not furnished with any important 
spines or hairs, and armed at the inferior angle with a 
triangular tooth, which corresponds with the extremity 
of the finger. The third pair of legs are shorter than the 
two succeeding, which are subequal. The fourth and 
fifth joints of the last pair are broadly developed in the 
mature males, but in the females and young males they 
are not different from those of the preceding genus. The 
three posterior pairs of appendages are short and spinous, 
the posterior being very short. The middle tail-piece is 
single and pyriform. 
The Shore-liopper is more compressed laterally than the 
