CYRTQPHIUM DARWINII. 
481 
AMPPITPODA. 
NAT ATOM A. 
PODOCERIDES. 
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 ^ inch. 
Cyrtophmm Darwvnii. 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 
