KUNGL. SVENSKA VETENSKAPSAKADEMIENS HANDLINGAR. Band 41. N:o 4. 



Division of Mollusks 

 Sectional Library 



NORTHERN 



AND 



ARCTIC INVERTEBRATES 



IN THK 



COLLECTION 



OF THK 



SWEDISH STATE MUSEUM 



(RIKSMUSEUM) 



III. 



OPISTHOBRANCHIA AND PTEROPODA 



BY 



NILS ODHNER 



WITH THREE PLATES 



COMMUNICATED MAY 9TH 1906 BY H.J. THEEL AND CHK. AÜRIVILLIUS 



ft 



UPPSALA & STOCKHOLM. ALMQVIST & WIKSELLS BOKTRYCKERI-A.-B. 



BERLIN LONDON PARIS 



R. FRIEDLÄNDER & SOHN WILLIAM WESLEY & SON LIBRAIRIE H. LB SOUDIER 



11 CARLSTRASSE 28 ESSEX STREET. STRAND 174 BOULEVARD S:T GERMAIN 



