vol.i] Setchell— Gardner: — Algce of Northwestern America. 311 



specimen, but the chief difference seems to be the more distinctly 

 serrated margins of the Senegambian plant. Schmitz says 

 (1896-1897. p. 374) that the spores are terminal on the sporifer- 

 ous filaments. They are so situated in young specimens of our 

 plant, but, iu mature eystocarps, they are seriate. 



Euthora cristata (L.) J. Agarclh. 



Abundant in the snblitoral zone. Shumagin Islands and 

 Seldovia, Cook Inlet. Alaska, Saunders (1901, p. 435). 



We have been unable to examine specimens of the plants 

 mentioned above, but suspect that some of them, at least, may 

 belong rather to what we take to be E. fruticulosa. 



Euthora cristata f. typica Kjellmau. 



On other algae in the upper sublitoral zone. St. Lawrence 

 Island. Alaska. Kjellman (1889, p. 27). 



Kjellmau finds this variety abundant at St. Lawrence Bay in 

 Siberia, and scarce at Bering Island, Siberia and St. Lawrence 

 Island. Alaska. He also finds a plant scarce at Bering Island 

 which he calls f. pinnata, but which seems to be close to the next 

 species. 

 Euthora fruticulosa (Euprecht) J. Agardh. 



Bering Sea, Herb. University of California; west coast of 

 Whidbey Island, Wash.. X.L.G., No. 32! 



These specimens are distinctly different iu habit from any 

 specimens of E. cristata from New England seen by us. The 

 frond is more elongated and very distinctly pinnate.. The plants 

 are all slender and the structure is very much like that of Cysto- 

 elonium. The medulla is more distinctly filamentous, while the 

 cortex is composed of several series of cells arranged in short 

 filaments at right angles to the surface. The tetraspores are 

 usually zonate, but some occur which are cruciate, while others 

 are tripartite, and still others are combinations of zonate with 

 either cruciate or tripartite. This occurs also in E. cristata. 



Rhodophyllis dichotoma f. typica Kjellman, 



On other algae, in the sublitoral region. St. Lawrence Island, 

 Alaska, Kjellmau (18S9, p, 27);' St. Paul Island, Alaska, 

 RuprecJit (1851, p. 593, under GiUaria fused) . 



We have not seen specimens of this plant. 



