Vol.1] SetcheU-Gardner. — Algce of Northwestern America. 207 



Kadiak Island, Alaska, ir-.^.N". (ind A.A.L., No. 5124!; lower 

 litoral zone, west coast of Whidbey Island, Wash., N.L.U.l 



The plants referred under this species agree very well with 

 the description and figure of Rosenvinge, except that some have 

 apical papilltp. Some of them do not have these and agree in this 

 w^ith the original description. 



Family HYDRODICTYACEJ^. 



Pediastrum Boryanum (Turpin) Meneghini. 



Intermixed with other algfe of fresh water pools. Point Bar- 

 row, Alaska, Farlow (1885, p. 192); Popof Island, Alaska, 

 Samiders, (11)01, p. 409). 



Pediastrum angulosum (Ehrenberg) Meneghini. 



Intermixed with other algfp in shallow pools and ponds of fresh 

 water. Glacier Valley, Island of Unalaska, Alaska, A.A.L., 

 No. 5023a! ; Popof Island, Alaska, Saunders (1901, p. 409). 



Sorastrum spinulosum Na^geli. 



Among water weeds in ponds of fresh water. Near Seattle, 

 Wash., Professor T. C. D. Kincaid, No. 768! 



Very scanty, l)ut of undoubted occurrence in the si)ecimen 

 quoted. 



Family ULVACE^. 



Monostroma lubricum Kjellman. 



Sitka, Alaska, Ida M. Eodgers, No. 5722! 



Monostroma latissimum (Kuetzing) Wittrock. 



On stones and mussels, lower litoral zone, in more or less 

 brackish water. Iliuliuk, Unalaska, Alaska, TF.J^.*S\ and A. A. L., 

 No. 4020! ; on Fucus, litoral zone, Uyak Bay, Kadiak Island, 

 Alaska, ir.A.iS'. ((nd A.A.L., No. 5077! (a younger form); in 

 brackish pools, near LaConner, Skagit County, Wash., N.L.G., 

 No. 567! 



Monostroma quaternarium (Kuetzing) Desmazieres. 



West coast of Whidbey Island, W^ash., X.L.G., No. 187! 



