15^ SAUNDERS [392] 



S. Collins. Most of the Oscillatoriaceas were determined by 

 Dr. Maurice Gomont, and the list of Bacillariace£e is entirely 

 the work of Professor A. M. Edwards. Acknowledgment is 

 also due Dr. F. R. Kjellman, who examined many of the 

 Alarias and the species of Fucus and named the entire collec- 

 tion of CorallinaccEe ; to Dr. W. A, Setchell for examining 

 several species of Layninaria and Cyanophyceae ; and to Dr. W. 

 G. Farlow for determining several species of the Rhodophyceas. 

 My thanks are also due to Dr. C. E. Bessey for the loan of 

 valuable books, to Professor Conway MacMillan for library and 

 herbarium privileges and for the loan of books, and to Miss 

 Josephine E. Tilden for the privilege of examining material, 

 preserved in fluid, of her entire Puget Sound collection. 



In this paper are catalogued 380 species of algae, of which 

 nine are new to science and 240 new to Alaska. 



The number of species, both fresh water and marine, in each 

 of the six classes of algae is : 



GEOGRAPHIC DISTRIBUTION. 



Though the algal flora of the Pacific coast in not well enough 

 known to enable a map showing the exact distribution of species 

 to be made, yet, enough collecting has been done to indicate 

 the general distribution. 



The Cyanophyceae, Chlorophyceae, Bacillariaceee and the 

 single freshwater species of the Rhodophycese (^Batrachosfer- 

 mum vagnum) are so largely cosmopolitan that they have been 

 disregarded in the table which follows. Of the remaining 126 

 species, comprising the Phaeophyceae and Rhodophyceae, only 

 seven are found on the southern California coast, 37 occur on 

 the central California coast, 68 range from Puget Sound north- 

 ward into Alaska waters, 49 are peculiar to the Pacific coast of 

 North America, and 55 are either circumpolar or inhabitants 



