226 GYGE GALATHE.E. 



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 antennae 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 antennae 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 



