Vol.1] SetcJieU-Ganhier. — Algw of Northwestern America. 211 



5117! ; Uyak Bay, Kadiak Island, Alaska, ^Y.A.8. and A.A.L., 

 No. 5102!; Doug-las, Alaska, U hired Jen ne No. 647! 



The specimens noted above were all found growing attached 

 except possibly (and probably) the last. The form is found 

 floating along the whole extent of Alaskan coast from near 

 Wrangell to the Pribilof Islands. It is the form commonly 

 observed. Young specimens of this form, collected at Unalaska, 

 show that the fistulose character of the midrib, appears very 

 early in the course of development, since specimens with blades 

 15 cm., or less long, show it well developed. 



Alaria fistulosa f. platyphylla Setchell. 



Blade broad, usually 60-90 cm. broad, midrib very much 

 inflated and In-oad. The sporophylls are numerous, often as 

 many as 90 or 100 on each side of the rhachis, are long and 

 narrow, generally being linear-lanceolate in shape, 30-50 cm. 

 long and 3-6 cm. wide. 



Growing in deep water, usually found floating or cast ashore. 

 Deeper parts of the Bay of Unalaska, Unalaska, Alaska, W.A.8., 

 A.A.L., (did L. E. Hunt, No. XLII in Collins, Holden and 

 Setchell, P. B.-A! ; seen floating in a number of localities in the 

 Gulf of Alaska. 



The present form seems to be an inhabitant of deep waters 

 and is usually found floating or cast ashore. A single complete 

 specimen cast ashore at Iliuliuk, Unalaska, Alaska, was found 

 to measure somewhat over 25 meters in length, over 1 meter in 

 width, with a large bunch of long sporophylls numbering about 

 200. 



Alaria cordata Tilden. 



Attached to rocks, lower litoral and upper sul)litoral zones. 

 Yakutat Bay, Alaska, Saunders (1901, p. 426); Port Renfrew, 

 B. C, Tilden, No. 241b! ; San Juan Island, Wash., Tilden, No. 

 241a! 



The species noted above is known to us from a \<»ung speci- 

 men (Tilden, No. 241a), a couple of sporophylls (Tilden, No 

 241V)) and the tigure of Saunders (1901, pi. 56). There seems to 

 be no character to separate it from .1. I'l/dllii. 



BOT. — I'.l 



