GAMMARIDiE. 
182 
AMPH1P0DA. PH OXIDES. 
NAT ATOM A. 
Genus— DARWINIA. 
Darwinia . Spence Bate, Brit. Assoc. Rep. 1855, p. 58. Ann. Nat. Hist. 
1 ser. xix. 141, Feb. 1857. Cat. Crust. Amph. Brit. Mus. 
p. 108. 
Generic character. Cephalon produced anteriorly. Superior 
antennae without a secondary appendage. Gnathopoda smaller 
than the pereiopoda, subchelate. Pereiopoda subequal ; dactyla 
powerful. Posterior pair of pleopoda biramous. Telson 
single. 
The head of this genus is produced anteriorly to a 
point. The body is arched, and the segments subequal. 
The third segment of the tail is remarkable for being not 
so deep as the preceding, a feature which exhibits an 
approximation to the character of Oxyceplialus , and other 
genera among the Hyperina. The eyes are round, and 
situated at the lateral margins of the head, between the 
superior and inferior antennae. The superior antennae 
are subequal to the inferior, somewhat more robust, and 
not furnished with a secondary appendage. The first 
two pairs of legs are small, and imperfectly subchelate, 
the second being a little larger than the first, but neither 
of them is as large as the true walking legs, all of which 
are about the same length, rather short, but very robust 
and strong, each terminating in a long, stout, slightly- 
curved, sharp finger. The caudal appendages are bi- 
ramous, and the terminal piece consists of a single 
plate. 
This genus bears a close resemblance to Kroyer’s de- 
