vol. lj Setchell— Gardner. — Algce of Northwestern America. 295 



and iu having' the gonhnoblasts uniformly lining the interior of 

 the fruit cavity, while from the former, it differs in being; mem- 

 branaceous and uncalcified. The name is taken from Whidbey 

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



Whidbeyella cartilaginea Setchell and Gardner gen. et. sp. 



nov. Plates 23. 24. 



Plant 15 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, 

 blunt divisions which are somewhat proliferous from the margins. 



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

 No. 632! 



Only a single battered specimen preserved in formalin solu- 

 tion is available. The color was a light 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 Reinsch. 



On stems of Polysiphonia. Sitka, Alaska, Saunders, (1901, 

 p. 433). 



Gelidium corneum var. lepadicola P. & R. 

 Gelidium corneum var. simplex P. & R. 



These two plants are mentioned by Postels and Ruprecht 

 I L840, p. 16) as occurring on shells at Sitka, Alaska. We fail 

 to find any farther information concerning them. 



Gelidium Amansii Lamouroux. 



On rocks, lower litoral aud upper sublitoral zones. Port 

 Renfrew, B. C, Tilden, Xo. 513!, under G. latifoKum; East 

 Sound. Orcas Island, Wash., X.L.G., Xo. .722! 



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 



