KONGL. SVENSKA VETENSKAPS-AKADEMIENS HANDLINGAR. Bandet 15. No 7. 



ON 



THE OLIGOCHiETA 



COLLECTED DURING THE SWEDISH EXPEDITIONS TO THE ÅRCTIC REGIONS IN THE YEARS 



1870, 1875 AND 1876. 



BY 



GUSTAF EISEN. 



WITH SIXTEEN PLATES. 



COMMUNICATED TO THE R0YA1, SWEDISH ACADEMY OF SCIENCES DECEMBER 12, 18" 



^STOCKHOLM, 1879. 



P. A. NORSTEDT & SÖ NE K. 

 KONGL. BOKTRYCKARE. 



