226 GYGE GALATHES. 
flat tail, which is the broadest part of it. The head is very 
nearly circular, flattened slightly at the anterior margin and 
cut off posteriorly by the first segment of the body, but 
still forming more than a semicircle. The first segment of 
the body is as long as and scarcely broader than the head ; 
the lateral margins are square. The six following segments 
are of the same length as the first, but gradually increase 
in breadth and become more and more pointed at the lateral 
margins, as they proceed towards the posterior extremity. 
The first segment of the pleon is somewhat less in length 
and breadth than the last of the pereion. The remain- 
ing segments decrease until the fifth, which is very small, 
and forms with the sixth a small forked extremity. 
The eyes are small, irregular patches of black pigment 
situated near the latero-posterior angles of the head. 
The first antenne are small, and scarcely reach to the 
anterior margin of the head; they consist of two joints, 
each as broad as long, and a third that is much smaller 
and tipped with cilia. The second pair of antenne are 
nearly three times as long as the first, and project beyond 
the lateral margins a considerable distance ; they consist 
of five joints, and a minute triarticulated flagellum. The 
first three joints are subequal in length and diameter, the 
fourth is narrower and longer than the preceding, the 
fifth is still narrower and short, and appears to form the 
basal part of the small triarticulated flagellum, which 
supports, as well as the three preceding joints, a few short 
hairs. The organs of the mouth form a central conical 
process, but they have not been dissected out. The first 
pair of feet (first pair of gnathopoda) are large, strong 
and subchelate, the palm is concave, and the long curved 
dactylos impinges by the apex only against the dental 
projection of the posterior angle of the palm. The 
second and succeeding pairs of limbs gradually but 
