AMPHTPODA. 



NATATORIA. 



CYRTOPHIUM DARWINII. 481 



PODOCERIDES. 



CYRTOPHIUM DARWINII. 



Specific character. Pereion imbricated. Superior antennae not reaching 

 beyond the peduncle of the inferior. Second pair of gnathopoda having the 

 propodos as long as the cephalon and first two segments of the pereion. 

 Posterior pair of pleopoda scarcely reaching beyond the extremity of the 

 telson. Telson suborbicular, squamiform. 



Length |j inch. 



Cyrtophwm Darwinii. SPENCE BATE, Rep. Brit. Assoc. 1859, p. 59. Ann. 

 Nat. Hist. 2 ser. xix. p. 148. Cat. Amph. Brit. 

 Mus. p. 274, pi. xlvi. fig. 8. WHITE, Pop. Hist. 

 Brit. Crust, p. 196. 



THE dorsal aspect of the head is square, with a small 

 point anteriorly produced between the superior antennae. 

 The eyes are prominently situated upon each side of the 

 anterior lateral angles. The body, seen from above (fig. *), 

 is oval, every segment of which has the posterior half ele- 

 vated into a ridge, which, viewed in a lateral aspect, gives 

 the animal somewhat of an imbricated appearance. The tail 



i i 



