364 University of California Publications. (botany 



form. Such characters as these vary so much in our Amphiroas, 

 that they are hardly good ones to establish form-characters upon, 

 much less specific. 



The AmpMroa corynibosa. of Harvey's List (1862, p. 169), 

 represented only by fragments in the collection he received, 

 judging from his idea of that species as represented in the Nereis 

 Australis (pi. 38) may also belong to this form. As to the varia- 

 tions of this form as represented by Kuetzing (1858, p. 31, 

 pi. 63) they are all represented in our collections and may be 

 classed as subforms. The subf. laciniata is especially well 

 shown in specimens under our No. 4057. The subf. antennifera 

 occurs more or less generally, but usually not in any considerable 

 quantity. The subforms normalis and polyphora are not well 

 set off from one another, but are both represented in Tilden's No. 

 503 in our copy of the American Alga?. 



Amphiroa epiphlegnoides -J. Agardh. 



On rocks and other alga>. Prince William Sound and Sitka, 

 Alaska, Saunders (1901, p. 442) ; Strait of Juan de Fuca, Harvey 

 (1862, ]). 169). 



We do not know this species. Yendo thinks (1902, p. 715) 

 that it is quite similar to Amphiroa tuberculosa, and places it 

 provisionally under that species (our f. typica) as a synonym. 



Corallina officinalis L. 



Puget Sound, Bailey ami Harvey (1862, p. 162); Esquimalt, 

 B. ('., Harvey (1862, p. 169). 



After a careful and extensive consideration of the puzzling 

 forms of Corallina of the western coast of North America, we 

 have decided that the best arrangement, for the present, at least, 

 is to place all the plants which have ecorniculate cystocarps 

 under this species as forms. We have not seen the plants quoted 

 above, and consequently place them under the species without 

 comment. 



Corallina officinalis f. typica Setehell and Gardner comb. 



nov. 



The plant, seemingly to be considered as the type of the 

 species, is to be distinguished by its more or less regularly bipin- 



