412 
GAMMARIM. 
AMPHIPODA. GAMMARIDES. 
NATATORIA. 
EISCLADUS LONGICATJDATUS. N. S. 
Specific character. Eyes round. Superior antennae more than half the 
length of the animal. Inferior antennae nearly as long as the superior, both 
strongly setose on the inferior margin. Second pair of gnathopoda having 
the propodos with the palm excavated. Posterior pair of pleopoda having 
the inner ramus rudimentary, the outer one longer than the peduncle, and 
tipped with a second joint or strong spine. Telson lanceolate. 
Length ^ inch. 
The body of this animal is arched ; the sixth segment 
being nearly three times as deep as the first. The eyes 
are round, and situated on a lobe projecting forward 
between the superior and inferior antennae. The su- 
perior antennae are more than half the length of the 
animal, and the peduncle is longer than the flagellum. 
The inferior antennae originate posteriorly, and do not 
reach quite as far as the superior ; the peduncle is longer 
than the flagellum. In both pairs the peduncle as well 
