, 



DEPARTMENT OF MARINE BIOLOGY 



OF 



THE CARNEGIE INSTITUTION OF WASHINGTON 

 ALFRED G. MAYOR, DIRECTOR 



VOLUME XIV 



EXPEEIMENTS IN THE BBEEDING OF CEEIONS 



BY 



PAUL BARTSCH 



Curator of Marine Invertebrates, United States National Museum 



WASHINGTON, D. C. 



PUBLISHED BY THE CARNEGIE INSTITUTION OF WASHINGTON 



1920 



