192 
GAMMARTDiE. 
AM PHI POD A. 
NAT A TORT A. 
PIIOXIDES. 
UROTHOE. 
Urothoe. Dana, United States’ Explor. Exped. p. 920. Spence Bate, Cat. 
Amph. Brit. Mus. p. 114. 
Generic character . Body scarcely compressed. Eyes two. 
Superior antennas having a secondary appendage. Gnathopoda 
subequal, subchelate. Pereiopoda having the dactyla constant. 
Posterior pair of pleopoda biramous. Telson double. 
Some of the species of this genus bear a resemblance 
to Sulcator. The body is but slightly, if at all, com- 
pressed. They have two eyes, which are always small 
and round. The superior antennae have a secondary 
appendage. The coxae are very large and deep ; the 
fifth pair being smaller than the preceding. The first 
two pairs of legs are subchelate, and are furnished with 
well-developed fingers, as are all the other legs — a cha- 
racter sufficiently important to separate the species of 
this genus from that of Sulcator. The posterior pair of 
caudal appendages are two-branched, the branches being 
very long and foliaceous. The terminal plate is double. 
