FRESH-WATER ALGA: 



OF THE 



UNITED STATES; 



(EXCLUSIVE OF THE DIATOMACE^E) 



COMPLEMENTAL TO 



DESMIDS OF THE UNITED STATES; 



II. 



PLATES. 



2300 ILLUSTRATIONS, 



COVERING ONE HUNDRED AND FIFTY-SEVEN COLORED PLATES. 



BY THE REV. FRANCIS WOLLE, 



Member of the Au:erica-n Society of Microscopists. 



BETHLEHEM, PA.: 

 THE COMENIUS PRESS. 



1887. 



