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bulletin: museum of comparative zoology. 



List of hyperiid amphipods. 



The numbers denote the relative abundance of the various species 

 in the Plankton hauls, November, 1912-May, 1913, except those in 

 italics, which give the absolute numbers of individuals in the hauls 

 in question. 



No hyperiids were taken in any of the hauls made by Mr. Welsh. 



List of euphausiids, identified by H. J. Hansen. 



The Euphausiacea collected in the Gulf of Maine, during the sum- 

 mer of 1912 and winter of 1912-1913, have been identified by Dr. 

 H. J. Hansen. They belong to six species: — Meganyctiphancs nor- 

 vegica Sars, Thysanoessa inermis Kroyer, Thysanoessa raschii Sars, 

 Thysanoessa longicaudata Kroyer, Thysanoessa gregaria G. O. Sars, 

 and Nematoscelis megalops G. O. Sars, all so well known that only 

 the geographic aspect of their occurrence need be touched on here. 

 But this is considerable, because, so far as I can learn, only two 

 euphausiids Thysanoessa inermis, and Meganyctiphancs norvegica, 



