DEPARTMENT OF MARINE BIOLOGY 
OF 
THE CARNEGIE INSTITUTION OF WASHINGTON 
ALFRED G. MAYOR, Director 
PAPERS 
FROM THE DEPARTMENT OF MARINE BIOLOGY 
OF THE 
CARNEGIE INSTITUTION OF WASHINGTON 
VOLUME XIII 
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Lion anes 
WASHINGTON, D. C. 
PUBLISHED BY THE CARNEGIE INSTITUTION OF WASHINGTON 
1919 
