THE AMPHIPODA COLLECTED BY THE U. S. BUREA1 

 OF FISHERIES STEAMER "ALBATROSS" OFF THE 

 WEST COAST OF NORTH AMERICA, IN L903 AND L904, 

 WITH DESCRIPTIONS OF A NKW FAMILY AND SEV 

 ERAL NKW GENERA AND SPECIES. 



By Samuel J. I [olm es, 

 Of tin 1 Zoological Laboratory of tin I niveraity of Wisconsin, 



The ((illcct ion of Amphipoda which was obtained by the 1 . S. 

 Bureau of Fisheries steamer Albatross during its cruises off the 

 northwesi coasl of North America during the Salmon Envestigations 

 of L903 ;iimI off southern California in L904, proved to be peculiarly 

 rich in new species. The amphipod fauna of the Pacific Ocean, and 

 especially thai portion of it bordering the North American continent, 

 is very imperfectly known. The species hitherto described have been 

 mainly Littoral forms, and as a large proportion of the Amphipoda 

 obtained by the Albatross were dredged from considerable depths 

 it is not surprising that the percentage of new species is high. < H ing 

 probably to the depth inhabited by many of the species quite a 

 number were found t<> be devoid of eyes. 



One of the striking features of the collection was the number of 

 species <>t' Ampelisca, most of which proved to be new . The Lysianas 



sidse were represented by seven species, all new ; for I" ■ ol these 



it was found necessary to institute new genera, one of which. I alet- 

 tiopsis, is of interest on account of its primitive and transitional 

 character. One species, Stilipes distinct ■. was so unique in it- char 

 acteristics thai a new family had to be created to receive it. and the 

 two species of the new genus Gracilipe& were perhaps sufficiently 

 aberrant to be treated in the same way, but as the Calliopiidae, by a 

 little stretching, could be made to include them it was thought best 

 to let them remain in thai family. 



Proceedings U. S. National Museum, Vol. XXXV-No. 1654. 



188 



