[EXTRACTED FROM THE REPORT OE t\iE U. S. COMMTSSTONEK OE 

 EiSH AND FISHERIES FOR 1889 TO 1S;)1. Pages 5i« to Gil.] 



PLANKTONIC STUDIES: 



A COMPAIUTIVE INVESTIGATION OF THE IMPORTANCE 



AND CONSriTLlTION OF THE PELAGIC 



FAUNA AND FLORA. 



BY 



EHISTST II.ZECi4l. 



[TJa^NSriATED I3Y GEORGE WILX0:N^ EIELD.] 



washingto:n': 



GOVERNMENT PRINTING OFFICE. 



1893. 



