230 University of California Publications. [botany 



Family BRYOPSIDACE^E. 



Bryopsis hypnoides Lamouroux. 



Growing on old wood of floats and piles. Victoria, B. C, 

 N.L.G., No. 510! ; British Camp, San Juan Island, Wash., 

 N.L.G., No. 206! 



Determined by F. S. Collins. 



Bryopsis corticulans Setchell. 



On rocks at low water mark. Sackman's Point, near Tracy ton, 

 Kitsap County, Wash., Tilden, No. 371! (under B. plumosa). 



This differs from B. plumosa, in being coarser and less 

 regularly distichous, but the corticatiug filaments are very nearly 

 wanting. It seems best to refer it to B. corticulans, which may, 

 however, only be an extreme form of B. plumosa. Mr. Collins 

 notes that the specimen in the copy of the American Alga? in 

 Herb. Farlow, seems to be good B. corticulans. 



Family DERBESIAGELE. 



Derbesia vaucheriaeformis (Harvey) J. Agardh. 



On a sponge. Yakutat Bay, Alaska, Saunders (1901, p. 415) . 



Derbesia marina (Lyngbye) Sober. 



In quiet water. Sitka, Alaska, Saunders (1901, p. 415). 



Family VAUCHERIACE^K . 



Vaucheria sessilis (Vaucher) DC. 



On a dripping cliff, Juneau, Alaska, Saunders (1901, p. 415) j 

 in a small stream of running water, Seattle, Wash., X.L.G.* 

 No. 384! 



Vaucheria geminata var. racemosa Walz. 

 Seattle, Wash., K.L.G., No. 668! 



Vaucheria hamata (Vaucher) Lyngbye. 



On moist ground. Near Green Lake, Seattle, Wash. , N.L. G. , 

 No. 368! 



