134 TANAIDAE. 
ISOPODA., TANAIDE. 
ABERRANTLIA. 

LEPTOCHELIA EDWARDSII. 
Specific character, Superior antenne half the length of the animal ; 
inferior antenn not so long as the basal joint of the superior. First pair of 
gnathopoda long, robust, with gaping chela, having the infero-digital process 
armed with two strong blunt teeth. Posterior pair of pleopoda short, being 
less than half the length of the pleon. 
Length } inch. 
Tanais Edwardsii. Kroyer, Naturh. Tidsskr, iv. 181, pl. ii. figs. 18-19. 
Dana, U.S. Expl. Exped. p. 800. 
Tue animal is slender and linear. The head is fused 
with the first segment of the body, the six following seg- 
ments subequal, the anterior being somewhat the smallest. 
The tail consists of six segments, of which the last is 
rather the longest and terminates in an obtuse apex. 
The eyes are small, round, consisting of six or seven 
rather large lenses, and planted on a small peduncle 
placed in front of the anterior margin of the cephalon, 
which, however, partly covers it. The superior pair of 
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