Vol.1] Sefchell-Gardner. — Alg(e of Nortliwesiem America. 267 



a species of the very cold and rough waters. On the Ishmd of 

 Aniaknak, it grows in great abundance and was found in all 

 stages of growth. The earliest fronds are ovate and wdth short 

 stipes. Later they become broadly reniforni and begin to roll 

 in at the edges on both sides of the stipe, looking very much like 

 a young Aganint Turtxri in this stage. The scrolls thus formed 

 become more ])rononnced, perforations appear, and the central 

 portion of the frond begins to erode and wear away, until finally 

 there are left the much enlarged and thickened, perforated 

 scrolls which wear away on one edge (the inner) and continue to 

 uni-oU on the other. As they continue to grow, the ])asal portion 

 of each scroll becomes a sort of stipe and the young plant is 

 plainly dichotomous. As the plant grows on and branches in the 

 irregular manner described by Rosenthal (1890, p. 140, f. 33, 3'1), 

 this basal dichotomy becomes inconspicuous, and does not seem 

 to have attracted attention before. Its peculiar origin is similar 

 to the process which takes place in Eisenia and in HeiloplnjIJutu 

 snhxf^sih as mentioned above. 



Arthrothamnus bifidus (Gmelin) Rnprecht. 



Aleutian Islands, Alaska, ArescJioHf/ (18S4, j). 14). 



We know nothing of the occurrence of tliis species of the 

 Ochotsk Sea and of Bering Island within our territory, farther 

 than the reference quoted above. 



Dictyoneuron Californicum Kuprecht. 



Port Renfrew, B. C, Tildev, No. .110! 



Apparently only just reacliing the coast of Vancouver Island, 

 certainly not abundant in Puget Sound. This is one of the com- 

 mon species at various localities on the central Calif ornian coast. 



Lessonia litoralis Farlow and Setchell. 



Port Renfrew, B. C, Tilden, No. 342!, Biiflfy and Polley, 

 No. 50. 



This species was tirst found on the coast of Oregon by E. 

 Hall, mentioned by Farlow (187.'), p. 3.55), and doubtfully 

 referred to L. fusrescens. Later, the same author referred it to 

 L. liigrescens (1876, j). 708), l)ut on collecting good material at 

 Monterey, California, he recognized it as new, but only gave it 



