vol. i] Setchell— Gardner. — Alga of Northwestern America. 365 



uate branching and the more or less slender tapering branchlets. 

 We have not seen a specimen of this from our territory. 



Corallina officinalis f. Chilensis (Decaisne) Kuetzing. 



On rocks in the upper sublitoral and in deep pools in the 

 litoral zone. Port Renfrew, B. C, Yendo (1902, p. 718). 



We have seen no specimens of the type of this form, as 

 represented by Kuetzing (1858, pi. 66 f. I) from our territory, but 

 it is not uncommon in various localities on the coast of California. 

 The very simple condition represented by Kuetzing aud by Yendo 

 (1902, pi. 54, f. 1) is not so abundant as conditions with the 

 branches aud branchlets more numerous and passing into states 

 characteristic of the second and third forms below. It seems to 

 us that it is to be distinguished from the preceding by its less 

 slender and less tapering branchlets. 



Corallina officinalis f. robusta Setchell and Gardner f . nov. 



The type of the present form is a plant of the Californian 

 mast which has been distributed under 499 of Collins, Holdeu 

 and Setchell 's Phycotheea Boreali- Americana. It differs from 

 the forms just mentioned iu being larger and stouter, the joints 

 being more inclined toward a triangular outline in the main 

 axes, while the pinnules and ultimate branchlets are more or 

 less flattened. The cystocarps and conceptacles are terminal on 

 longer or shorter branchlets, but at times the fertile branchlet is 

 so short that it seems sessile on the joint, or upon a projection 

 from it. 



In the upper sublitoral zone and in tide pools in the litoral 

 zone. West coast of Whidbey Island, Wash., N.L.G., No. 278! 



As it occurs on the Californian coast, this form presents a 

 series of gradations to f . Chilensis, but, as it becomes condensed, 

 its aspect is sufficiently changed to give it the appearance of a 

 very distinct plant. We suspect from the figures and descrip- 

 tions of Yendo that it includes his Gheilosporum MacMillani 

 (Yendo, 1902. p. 718, pi. 53, f. 4, 5, pi. 56, f. 11-14) from Port 

 Renfrew, B. C. That agrees very well with the specimens from 

 Whidbey Island, except that in these we have not found any 

 cystocarps on the faces of the joints. We have seen such struc- 

 tures on the faces of the joints of certain Californian forms of 



