KUNGL. SVENSKA VETENSKAPSAKADEMIENS HANDLINGAR. Band 48. N:o 
NORTHERN 
FERIETCETNYERTEBRATES 
COLLECTION 
OE” THE 
SWEDISH STATE MUSEUM 
(BRIKSMUSEUM) 
PROSOBRANCHIA. 1 DIOTOCARDIA 
BY 
NEEE SKOÖDERNEER 
WITH SEVEN PLATES 
COMMUNICATED DECEMBER 6TH 1911 BY HJ. THÉEL AND G. HOLM 
UPPSALA & STOCKHOLM. ALMQVIST & WIKSELLS BOKTRYCKERI-A.-B. 
BERLIN LONDON PARIS 
R. FRIEDLÄNDER & SOHN WILLIAM WESLEY & SON LIBRAIRIE C. KLINCKSIECE 
11 CARLSTRASSE 28 ESSEX STREET. STRAND 11 RUE DE LILLE 
— 
