Vol.1] Setchell-Gardner. — Algce of Northwestern America. 233 



at Point Cypress, near Pacific Grove, by Professor Harold Heath, 

 of Stanford University. In both these localities, as well as in 

 the locality quoted above, it was found growing on a substratum 

 of Litliothanmia. 



Family CHARACE.4:. 



Nitella acuminata subglomerata A. Braun. 



In a fresh water pond, near Prince William Sound, Alaska, 

 launders (1901, p. 416). 



Nitella opaca Agardhf 



In a f)'esh water pond near Kadiak, Alaska, Sounders (1901, 

 p. 416). 



Chara contraria A. Braun. 



In ponds and streams near Glacier Bay, Alaska, Saunders 

 (1901, p. 416). 



Chara fragilis Desv. 



In a fresh water i)()n(l, Shumagin Islands, Alaska, Saunders 

 (1901, 1). 416). 



PtlAiOPHYCh^A:. 



In this group we liave included all aig* with an additional 

 Itrown coloring matter, even taking in Hydrurus, which does not 

 seem to l^elong auywheiv. In the arrangement of genera and in 

 the adoption of generic names, we have followed Kjellman (1891- 

 1896) in Engier and Prantl, with some exceptions, particularly 

 in the Laminariaceae. As to species, while DeToni (1895) has 

 been of considerable assistance, it has been necessary to rely 

 chiefly upon the special papers for more light to determine doubt- 

 ful points and to make necessary revisions. In this group much 

 help is to be ol)tained from the papers of Mertens (1829), Postels 

 and Ruprecht (1840), Ruprecht (18-31), and Saunders (1901). 

 We have the pleasure of thanking Mr. Collins for some determi- 

 nations, and for looking over our manuscript and making valu- 

 able suggestions. Professor F. R. Kjellman, of Upsala, Sweden, 

 very kindly examined a series of s])eciniens of the very puzzling 



