Vol.1] SeicJieU-Gardner. — Algcv of yorthircsfern America. 367 



other forms, so that it cannot be considered to l)e a specitic char- 

 acter. The form as we understand it is synonymous with the 

 CoralUna Vnnconveriensh of Yendo, and like that, may be 

 divided into two subforms, as follows: snbf. laxa, equalling C. 

 VaiicoKveriensis f. fi/pira Yendo, and subf. densa equalling C. 

 Vaiiro)(reriensis f. (Jensa Yendo. 



Corallina officinalis f . aculeata (Yendo) Setchell and Gardner 

 comb. nov. 



In tide pools, uppermost litoral zone. Port Renfrew, B. C, 

 Yendo (1902, p. 720, under CoraUhia aciiJcofd) ; East Sound, 

 Orcas Island , Wash . , Y. L . Cz'. , No . 9 1 7 ! 



Corallina aciih^aia Yendo is simply the distorted state of the 

 preceding- form and the prickly, confusedly ramulose, and flattened 

 or angled branchlets, imperfectly, or in some cases, unusually 

 much calcified, are all due to unfavorable conditions of environ- 

 ment. 



Corallina gracilis Laniouroux. 



Mr. F. S. Collins has determined with some doubt, a speci- 

 men collected by Misses Butler and Policy at Poi't Renfrew, B. 

 C, as belonging to this species. 



Hildenbrandtia prototypus Nardo. 



On rocks in the middle litoral zone. Harvester Island, Uyak 

 Bay, Kadiak Island, Alaska, W.A.^. and A.A.I.., No. .1109!; 

 west coast of Whidbey Island, Wash., N.L.G., No. 40G! ; 

 Tracyton, Kitsap County, Wash., TUden, No. 201!, under 

 Peysonnellia Dnhyi. 



The plants placed under this species are dark blood red and 

 represent what has lieen called H. sanguinea. They ar(? darker 

 and thicker than the next. 



Hildenbrandtia prototypus f. rosea Hauck. 



On stones in the lower litoral and upper sublitoral zones. 

 Port Clarence, Alaska, Kjellman (1889, p. 26, under Hilden- 

 brandtia rosea); Shumagin Islands to Puget Sound, iSaiiiiders 

 (1901, p. 441, under Hildeiihrfiiidfia rosea) ; west coast of Whid- 

 bey Island, Wash., N.L.G., No. 128! 



A much thinner species than the last, of a rose red color, 

 and may represent a distinct species. 



