KUNGL. SVENSKA VETENSKAPSAKADEMIENS HANDLINGAR. Band 60. N:o 9. 



NORTHERN AND ARCTIC HYDROIDA FROM 

 THE SWEDISH ZOOLOGICAL STATE MUSEUM 



RY 



ELOF JÄDERHOLM 



COMMUNICATED NOVEMBER 12™ BY H.I. THÉEL AND E. LÖNNBERG 



STOCKHOLM 



ALMQVIST & WIKSELLS BOKTRYCKERI-A. -B. 



1919 



