Vol.1] S<4cli ell- Gardner. — Algce of Northwestern America. 25y 



Family. RALFSIACE.^i]. 



Ralfsia verrucosa (Areschoug) J. Agardb. 



Ou stones in tlie middle and lower litoral zones. Ilinlink, 

 Unalaska, Alaska, ]r..4.*V. and A.A.L.. No. 4011!; west coast 

 of Whidbey Island, Wash., X.L.G., No. 192! 



Both the plants placed under this species are sterile, Init they 

 seem otherwise to belong with this species rather than under 

 either of the following. 



Ralfsia deusta (Agardh) J. Agardh. 



On rocks and stones middle and lower litoral zones. St. 

 Lawrence Islaud and Port Clarence, Alaska, Kjelhnan (1889, 

 p. 47); near Iliuliuk, Unalaska, x\laska, ir.A.N. and A.A.L., 

 No. 40.")9! (sterile), Postels and RuprecM (1840, p. 20, under 

 Padina deusta); Kukak Bay, Orca, and Sitka, Alaska, Saunders 

 (1901. p. 424). 



Ralfsia clavata (Carmichael) Farlow. 



On small stones in the middle litoral zone. Iliuliuk, I^nalaska, 

 Alaska , W. A.S. and A.A.L.^^o. 401 2 ! 



The specimens noted here have fine unilocular sporangia and 

 seem to agree well with this species. 



Family LITHODERMATACE.^K . 



Lithoderma fatiscens Areschoug. 



On stones in the lower litoral and upper sublitoral zones. 

 Port Clarence, Alaska, Kjellnian (1889, p. 49) ; Iliuliuk, Unalaska, 

 Alaska, W.A.8. and A.A.IA 



The specimens are all sterile but the determination seems safe. 



Lithoderma lignicola Kjelhnan? 



On piles in the litoral zone. St. Michael, Alaska. TU.A.N., 

 No. 5245x! 



The specimens referred here are sterile, but they agree fairly 

 well with Kjellman's description and figures (1883, p. 256. pi, 26. 

 f. 8-11). 



