vol.i] Setchell— Gardner. — Al gee of Northwestern America. 265 



Costaria Turneri Greville. 



On rocks in the upper part of the siiblitoral zone. Unalaska, 

 Alaska. Buprecht (1852, p. 26, under G. quadrinervia) ; Shuma- 

 gin Islands, Kukak Bay, Prince William Sound, Yakutat Bay, 

 and Sitka, Alaska, Saunders (1901, p. 431); Sitka, Alaska, 

 Postels and Buprecht (1840, p. 12); Puget Sound, Bailey aud 

 Harvey (1862. p. 160) ; Victoria, B. C, Saunders (1901, p. 431) ; 

 Esquimalt. B. C, Survey (1862, p. 166), W.A.S., No. 1873!; 

 Port Renfrew, B. C, Butler and Policy, No. 8; Whidbey Island 

 aud elsewhere throughout Puget Sound, Wash., jS t .L.G., No. 

 87!, in Collins, Holden and Setchell, P. B.-A., No. XXXV!; 

 Tracyton, Kitsap County, Wash., Tilden, No. 238! (under G. 

 Merfensii) . 



So far as we know, the genus Costaria contains a single species, 

 the differences between C. Turneri and C. Mertensii being unstable. 

 G. quadrinervia Ruprecht is probably to be added, although we 

 searched carefully at Unalaska for such a form without success, 

 and, consequently, must judge from the description alone. It was 

 first collected by Menzies and described by Turner (1819, pi. 226) 

 as Fucus costatus. By a curious slip, Turner says on p. 72, "on 

 tlie western coast of South America," while on p. 73, he says, 

 "Habitat in oecideutalibus America? Septentrionalis littoribus". 



Agarum Turneri Greville. 



On rocks in the sublitoral zone, usually found cast ashore. 

 St. Lawrence Island, Alaska, Kjellman (1889, p. 43); St. Paul, 

 Alaska, Buprecht (1851, p. 244), Greeley and Snodgrass, No. 

 5794!, (Setchell, 1899, p. 592); Captains Bay, Unalaska, Alaska, 

 n .A.S. and A.A.L., No. 4088! ; Unalaska, Alaska, Postels and 

 Buprecht (1840, p. 12, under A. perfusion, p. 11, under A. 

 thin lini); Popof Island, Kukak Bay, Prince William Sound, and 

 Yakutat Bay, Alaska, Saunders (1901, pp. 430, 431, under A. 

 Turneri and A. Gmelini); Unga, Alaska, A.A.L., No. 5057!, 

 J. B. Downing, No. 5787!; Harvester Island in Uyak Bay, 

 Kadiak Island, Alaska, W.A.S. and A. A. L., No. 5111! ; Kadiak 

 Island, Alaska, Postels aud Buprecht (1840, p. 12, under A. 

 brassiewforme) ; Yakutat Bay, Alaska, Bev. Albin Johnson, 

 No. 5178!; Sitka, Alaska, Postels and Buprecht (1840, p. 12, 

 under A. platyneuron) . 



