HYPER1A. 11 



only differs in the infero-anterior angle of the carpus 

 being more strongly developed. Mr. Spence Bate 

 has also, in the Catalogue of Amphipoda of the 

 British Museum, incorporated Dana's genus Tauria for 

 a similar reason namely, that the wrists are only de- 

 veloped to a very small degree. In the same work 

 Mr. S. Bate has also suggested that the species of the 

 present genus are but the females of those of Lestrigonus. 

 He arrived at this conclusion after examining a consider- 

 able number of species of both genera, finding that it is 

 difficult, if not impossible, to assert (with reference to 

 the structure of the antennae) where one genus com- 

 mences and the other ends. Recently, through the 

 kindness of Mr. Edward, of Banff, we have had the 

 opportunity of examining many fresh specimens both 

 of Lestr ig onus and Hyperia, from the same locality, and 

 we found that all the adult Hyperite of which the sex 

 could be detected were females, but that none of the 

 Lestrigoni were of that sex. 



