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

CONTRIBUTIONS TO THE BIOLOGY OF THE GREAT LAKES, 
Pi PLANKTON ALGA OF LAKE ERIE. 
WITH SPECIAL REFERENCE TO THE CHLOROPHYCEA. 
“BY 
JULIA W. SNOW, 
Lnstructor in Botany, Smith College, Northampton, Mass. ° 
CSS ce 

Extracted from U, §, Fish Commission Bulletin for 1902. Pages 369 to 394, Plates I to IV. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICKEH. 
MOOR. 
