vol.i] Setchell— Gardner. — Algce of Northwestern America. 359 



Lithophyllum Farlowii f.? Foslie. . 



On limpet shells. West coast of Whidbey Island, Wash., 

 N.L.G., Xo. 657! 



Lithophyllum sp. nov. Foslie. 



On limpet shells. West coast of Whidbey Island, Wash., 

 X.L.G., Nos. 655!, 656! 



Lithophyllum (Lepidomorphum) Yendoi Foslie. 



On rocks in the sublitoral zone. Sitka, Alaska, Saunders 

 (1901. p. 442). 



Foslie remarks (1901, p. 13) that it is a question whether L. 

 Yendoi and L. deeipiens must not be considered as forms of one 

 and the same species. 



Melobesia Zostericolum f. mediocris Foslie. 



On Phyllospadix. Port Renfrew, B. C, Yendo; west coast 

 of Whidbey Island. Wash., X.L.G., No. 271! 



Melobesia (Heteroderma) marginata Setchell and Foslie. 



On Laurencia pinnatifida, X.L.G., No. 270! and on Odon- 

 thalia semicostata, X.L.G.. No. 269!, both on the west coast of 

 Whidbey Island, Wash. 



Amphiroa Aspergillum f. nana Setchell and Gardner f. nov. 



In loose and small tufts, among other algae on the rocks. 

 Fronds short, 2-3 cm. high, with branches and branchlets 

 pinnately arranged as in the type. This form differs from the 

 typical form only in its dwarf condition. 



Upper sublitoral zone. East Sound, Orcas Island, Wash., 

 X.L.G.. No. 482! The only occurrence of this species as yet in 

 our territory is this dwarf form from Orcas Island. The typical 

 form is found in abundance on the coast of California, and has 

 been distributed in Collins, Holden and Setchell, P. B.-A., No. 

 498, under Amphiroa nodnlosa . </*f)-, 



XT' 



Amphiroa cretacea (P. & R.) Areschoug. 



Attached to rocks or even to the spines of sea urchins, in 

 tide pools in the literal zone and descending to a depth of 10 

 fathoms or more in the sublitoral zone. St. Lawrence Island 



