c^i^Uvi^DEPARTMENT OF MARINE BIOLOGY 



THE CARNEGIE INSTITUTION OF WASHINGTON 

 ALP^RED G. MAYOR, Director 



>-.^ 



>/^«i6«^i 





PAPERSy 

 THE DEPARTMENT OF MARINE BIOLOGY 



OF THE 



CARNEGIE INSTITUTION OF WASHINGTON 



VOLUME XVIIl 



Published by the Carnegie Institution of Washington 

 Washington, November, 1922 



