118 TANAID^. 



from tlie length of the antennae (nearly equal to that of 

 the entire body), and to the greatly elongated anterior 

 pair of legs (nearly twice that of the antennae). It 

 is founded upon a minute species from the Feejee 

 Islands, and was observed by Mr. Dana to be caprelloid 

 in its habits, attaching itself by its hinder legs to sea- 

 weeds, and reaching out the long arms in different 

 directions as if in search of prey. In other respects 

 the genus is closely allied to Tanais, T. Edwardsii of 

 Kroyer, Tidssk. iv., 1842, pi. 2, figs. 13-19, being con- 

 sidered by Dana to belong to the same genus. This 

 is, however, doubtful, since, according to Fritz Miiller, 

 that species is the male of T. Savignyi, and it is not 

 improbable that the female of Leptochelia may also 

 prove to be a true Tanais, in which genus it has, indeed, 

 been placed by Lilljeborg in his recent memoir on this 

 family. 



