CHARLES PAUL ALEXANDER 
U.S. COMMISSION OF FISH. AND FISHERIES, 
GEORGE M. BOWERS, Commissioner. 


ee : ‘ ~~ CONTRIBUTIONS TO THE BIOLOGY OF THE GREAT LAKES. 
THE PLANKTON ALG-E OP LAKE ERIE, 
WITH SPECIAL REFERENCE TO THE CHLOROPHYCE-. 
JULIA. WwW. SNow, 
Instructor 1m Botany, Sintth College, Northampton, Mass. 

~ 
Extracted from U.S. Fish Commission Bulletin for 1902. Pages 369 to 394, Plates I to IV; 

eB 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1903. 
