vol. i] Setchell-Gardner. — Algce of Northwestern America. 289 



purea Pacifica. We hardly think that Agardh intended to use 

 either as a name for the Californian plant, but Saunders (1901' 

 p. 432), however, has used the latter to designate a plant from 

 Victoria, B. C, and without explanation. 



Porphyra laciniata (Lightfoot) Agardh. 



On rocks or on Fucus evanescens in the litoral zone, or even 

 in the upper sublitoral zone. West shore of Amaknak Island, 

 Bay of Unalaska, Alaska, W.A.S. and A.A.L., Nos. 3269!, 

 3270! : Orca. Alaska, W.A.S. and A.A.L., No. 5164! ; Yakutat 

 Bay. Alaska, Saunders (1901, p. 433), Be v. Albin Johnson, No. 

 14! : Sitka, Alaska. Saunders, No. 136! ; Annette Island, Alaska, 

 Saunders, No. 26! 



So far as the data are accessible to us, the present species 

 seems to be confined to the coasts of Alaska. In this, as in the 

 following species, we have followed the account of Hus (1902) 

 in the citation and distribution. P. laciniata is cooked by the 

 Indians of Yakutat Bay and eaten. This is reported to us by 

 Rev. Albin -Johnson, and we have observed Yakutat Indians at 

 Orca drying it, evidently for a food supply. 



Porphyra laciniata f. umbilicalis Agardh. 



St. Paul Island, Alaska, Townsend, No. 5780! (Setchell, 1889, 

 p. 593). 



Differs from the preceding chiefly in its well marked umbili- 

 cate base. 



Porphyra perforata J. Agardh. 



On 7-ocks in the litoral and upper sublitoral zones. Shumagin 

 Islands, Alaska, Saunders, No. 394!; Glacier Bay, Alaska, 

 Saunders, No. 100! ; Sitka, Alaska, Saunders, No. 130! ; Vic- 

 toria. B. C, X.L.G., No. 318!; Esquimalt, B. C, A.L.G.. No. 

 322!: Port Renfrew, B. C, Butler and Policy, No. 45; west 

 coast of Whidbey Island, Wash., N.L.G., No. 97! ; Orcas Island, 

 Wash., X.L.G., No. 295!; San Juan Island, Wash., X.L.G., 

 No. 286! 



A very common species in the region of Puget Sound, but less 

 so on the coast to the north. The species has been well defined 

 and described by Hus (1902). As a rule the typical form is a 



