2O2 SAUNDERS [43^] 



Delesseria serrata Post & Rupr. 



To this species is referred a plant with the general appearance of a 

 broad form of D. alata, but the branches are more distant and fewer 

 and the margins of the upper and younger branches are regularly or 

 irregularly serrate. It may be an extreme form of D. alata but it 

 seems best to keep it under a separate name until this is proven. 



Family RHODOMELACE^. 



Rhodomela floccosa Ag. 



In the littoral and sublittoral zones from Puget Sound to Bering 

 Sea. Annette Island (30, 56) ; Wrangell (68) ; Sitka (139) ; Yakutat 

 Bay (191, 203) ; Kukak Bay (321) ; Popof Island (374). 



One of the most abundant plants. It occurs also on the Washing- 

 ton, Oregon, and California coasts. 



Rhodomela larix Ag. 



Attached to rocks in the upper sublittoral and littoral zones ; abun- 

 dant from Puget Sound to the Shumagin Islands. Sitka (131) ; Ku- 

 kak Bay (318). 



Odonthalia aleutica (Mertens) J. Ag. 



Attached to rocks in the sublittoral zone, Shumagin Islands (385). 



The same species has been collected in Puget Sound by the writer. 

 The branches are narrower than in O. dent at a, the perithecia are ra- 

 cemed and very slightly oblong-urceolate, and the plant turns black in 

 drying. 



Odonthalia kamtschatica (Rupr.) J. Ag. 



On rocks in the sublittoral zone. Kukak Bay (341) ; Yakutat Bay 

 (219). 



In this species the plant is smaller than the last species and remains 

 a dark blood-red color in drying : the perithecia are short, racemed and 

 very strongly urceolate. 



Polysiphonia arctica J. Ag. 



In the sublittoral zone, Shumagin Islands (364, 366). 



Polysiphonia bipinnata Post & Rupr. 



Abundant on rocks and on other algae in the sublittoral zone, from 

 Puget Sound northward. Annette Island (19) I Glacier Bay (84) ; 

 Sitka (117) ; Yakutat Bay (244). 



Several specimens of Polysiphonia are undeterminable and for the 

 present can be noted only by numbers as follows; 25, 64, 123, 150, 

 154, 212, 363. 



