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 XVIIT 



ii/ 



Published by the Cabxegie iNSTmmoN or Washington 



Washington^ November, 1922 

 i It 



