Bacillariophyceae (33)

THE NEW YORK BOTANICAL GARDEN
DARIUS OGDEN MILLS FUND
FRESHWATER ALGAE OF PORTO RICO
COIÿl/ECTËD BY PROFESSOR N. WII^LE
UTU'ADO . MARCH -5*8, 1915
Determined by Francis Drouet
YO^
BOTANICAL
02112920