Tin: ir(\(i:.K oi' .iai'ax. 17 



(ii.ir. F.) (ir.s. A.) (Okami'ha); Wennai (n.n. r.), Kunashiri Isl.; liet- 

 tobu (H.ii. F.), Hitokappu Bay (!), Kubetsu ( ! ), Etorofn Isl.; Shire- 

 toko (iT.ii.F.), Shari (u.ii. i\), ^loyoro (ir. ii.i\), Mombetsii (ii.h.a.), 

 Risliiri Isl. (!), Kitaini Prov.; Urujipu Isl. (ir. ir. f.) (ir. s. a.) 

 (Okami'Ra); Kasliowa Isl.(!); Onnekotan Isl. ( ! ) ; Shashikotan 

 I.^l. (!); Poromnshiri Isl. (!) (ii.s.a.); Shininshn lsl.(!); Yavina, 

 Kamtseliatka(!). 



FifCHs htjJdifts Yaiii,. /. f'fïeitfffftfs IvOsknv. 



Plate I. Fio-. :]. 



RosENV.: Grœnl. p. 834. — Borges.: Mar. Alg. Filrœs. p. 4G5. — Retch. 

 and Garp.: Al^-. N. AV. Amer. p. 280. 



= Fucus eclentatus De la Pyl.: Flor. d. Terr. Neuv. p. 84. 



We have a form of Fucus on the east coast of Hokkaido, which 

 resembles Fucus evanescens in several respects; but it has narrower 

 lamina; and the ribs reach to the ultimate points of the terminal 

 segments. If the vanishing of the ribs at the upper portions of 

 the fronds and the broadness of the laminie have been taken as im- 

 jDortant points characterizing Fucus evanescens, the above must be 

 detatched from it, and should be referred to Fucks inßatus Vahl. 



Setchell and Gardner ^^ assign the S2:)ecies, with a few 

 formœ, to the northwest coast of North America. Ours probably 

 is equal to theirs although I could not find a form corresponding 

 to Fucus inßatus f. filiformis {F. filiformis Gmel.) on our coast. 



BÖRGESEN"' discussed minutely the various forms of Fucus 

 inßatus and compared them with the descriptions of former 

 writers. I can not enter upon a criticism of his opinion, as 

 most of the forms belong to the north Atlantic. I am therefore 



1) Setchell and Gardner : Algœ of N. "W. America. \^. 280-281. 



2) BöRGESEX : ^farine Algro of Fiircrs. p. 4'>6 et ?ef]. 



