[447] 



THE ALG^ 211 



Amphora ovalis C. G. E. 



In salt water from Glacier Bay. 



Amphora elliptica C. A. A. 

 In salt water, Yakutat Bay. 



Gomphonema geminatum C. G. E. 

 In a freshwater pond, Kadiak Island. 



Gomphonema affine F. T. K. 



In a freshwater pond, Kadiak Island. 



Gomphonema subtile C. G. E. 



In a freshwater pond, Popof Island. 



Rhoicosphenia curvata F. T. K. 



In salt water material from Annette Island ; Yakutat Bay ; Popof 

 Island. 



Cymbella inaequalis C. G. E. 



From salt water material from Annette Island. 



A freshwater species, the dead shells of which had been carried 

 into the ocean by streams or glaciers. 



Cymbella ehrenbergii F. T. K. 



In a freshwater pond, Popof Island ; Kadiak Island. 



Epithemia gibba C. G. E. 



In a freshwater pond, Popof Island ; Kadiak Island. 



Epithemia jurgensii C. A. A. 



In a freshwater pond, Popof Island ; Cook Inlet ; Annette Island. 



Epithemia westermannii C. G. E. 

 In a freshwater pond, Popof Island- 



