Vol. 1] Sefchell- Gardner. — Algce of ]\' art Ji we stern America. "295 



and in having the o-oninioblasts uniformly lining the interior of 

 the fruit eavit> , while from the former, it differs in being mem- 

 ln*anaeeous and uncalcified. The name is taken from Whidbey 

 Island, Wash., a locality furnishing us many rare plants. 



Whidbeyella cartilaginea Setehell and Gardner gen. et. sp. 

 nov. Plates 2^], 24. 



Plant 1.") cm. high, several fronds arising from the same point; 

 holdfast unknown; fronds narrowly cuneate below, gradually 

 widening above and deeply lobed or parted into a few, palmate, 

 lilunt divisions which are somewhat proliferous from the margins. 



Cast ashore. West coast of Whidbey Island, Wash., N.L.G., 

 No. G32! 



Only a single battered specimen preserved in formalin solu- 

 tion is available. The color was alight red. The cystocarps are 

 just beginning to form spores. The consistency is very firmly 

 cartilaginous. The figures represent the habit and the structure 

 of the plant much better than it can be described. 



Family GELIDIACE/E. 



Choreocolax Polysiphoniae lleinsch. 



On stems of P()lysii)honia. Sitka, Alaska, Sdnnders, (1901, 

 p. 438). 



Gelidium corneum var. lepadicola P. & R. 

 Gelidium corneum var. simplex P. & B. 



These two jjlants are mentioned by Postels and Ruprecht 

 (1S40, p. IG) as occurring on shells at Sitka, Alaska. We fail 

 to find any farther information concerning them. 



Gelidium Amansii Lamouroux. 



On rocks, hnver Utural and upper sublitoral zones. Port 

 Renfrew, B.C., Tilden,^o. 513!, under G. latifolimn- East 

 Sound, Orcas Island, Wash., N.L.G., No. 522! 



We are indebted to Mr. Collins for comparing Miss Tilden's 

 plant with material from the Californian Coast referred to this 

 species by Dr. Bornet. Similar plants have been distributed 



