Vol. 1] l^efchell-Gardner. — Alga- of Northwestern America. 237 



Ectocarpus terminalis Kuetzing. 



Ou stipes of Ahirin fistulosa P. &R. Iliiilink, Unalaska, 

 Alaska, W.A.S. and A.A.L., No. 5044a! 



Ectocarpus siliculosus t'. typicus Kjelhnan, eniciul. Kuckuck. 



On wood. Juneau, Alaska, H .A.*S. and A.A.Ij., No. olOT! 



The specimens referred to the species are very typical and 

 with g'ood plurilocular sporangia. Harvey (1862, p. 167) has 

 noted this species from Esquimalt, B. C, growing on Nereo- 

 cystis. 



Ectocarpus confervoides (Roth) LeJolis. 



On rocks, etc. Yakutat, Alaska, S'lKiuIers (1901, p. 418); 

 Port Renfrew, B. C, Bntley niid Polle)/, No. 24; near Coupe- 

 ville, Whidbey Island, Wash., N.L.G., No. 261! 



These may be forms more or less typical, but the information 

 is not exact in this respect. 



Ectocarpus confervoides f. typicus Kjellman. 



On Alaria. -luneau, Alaska, ir.A.N. and.4.A./7., No. .1196! 



Ectocarpus confervoides f. pygmaeus (Areschoug) Kjellman. 

 On various alga'. Shumagin Islands and Yakutat Bay, 

 Alaska, Saunders (1901, p. 418). 



Ectocarpus confervoides f . acuminatus Collins and Setchell 



f. nov. 



Habit and plurilocular sporangia of E. pf^iiicilhitHs Agardh, 

 but the branches and branchlets .are acuminate instead of ending 

 in a hair. 



On algff', particularly Desmarestia. Whidbey Island, Wash., 

 N.L.G., Nos. 28r)!, 448! ; Victoria, B. C, X.L.G., No. 317! 



The type is No. 285 and seems to be the same as the 

 E. penicillatus of Saunders's Phycological Memoirs (1898, p. 155, 

 pi. 21, f. 3, 4). It differs from E. penicillatus as figured and 

 described by Kuckuck (1891, p. 22, f. 5) in the lack of hairs 

 and in the lack of the pseudodichotomous branching. It is to be 

 distinguished from other forms of E. confervoides by the acumi- 

 nate terminal cells of the branches and liranchlets. 



