Tili: FLCA(E-E Ol" .lAi'A.X. !'.> 



hybrids between them may exist in nature. On one side, liow- 

 ever, it is not unreasonable to believe that too much stress has 

 been put on the broad laminœ and the vanishing ribs in separating 

 Faciis evanescens from Fucus inßaius Va hl. The considerable 

 formœ of and the distinction between Fucus evanescens and Fticus 

 inßatus have been repeatedly discussed, but I can not find any 

 reliable statement which clearly differentiates the two. A study 

 of the herbarium specimens labelled wnth either of the two 

 specific names would probably prove the ambiguity of the dis- 

 tinguishing characters. I have stood on the vast field of Fucus 

 evanescens at Juan de Fuca Strait, Vancouver Isl., lî. C; and 

 also on that at Kataoka Bay, Shimushu Island in the Kurile 

 group. Although 1 am not wholly convinced, still the two 

 collections made at those places have strengthened my incli- 

 nation to agree with Strömpfelt,'' who included under the single 

 species Fucus evanescens everything reported under the names 

 Fucus inßatus, F. edentatus and F. furcatus. I am not, however, 

 inclined at present to give any judgment on the matter as 1 have 

 not yet visited a Fucus reef in the north Atlantic. 



Localities : Osatsube, Oshima Prov. (h. s. a.) ; Mororan, Iburi 

 Prov. (ii. S.A.) ; Urakawa, Hidaka Prov. (ir. s. a.) ; Esashi, Kitami 

 Prov. (U.S.A.); Kushiro (T. Kawakami) (!); Nemuro(!); l\u- 

 betsu(!), Hitokappu Bay(!), Ktorofu Jsl. 



Fucus pfi'/'orniis (J,mi;i,. /, Pf/faiswi -I. A(i. 



DeTom: IMiyc. .Jap. Nov. j). 48. — Okam.: I'">iiuiiiei-. Alir. of. Jap. p. l-'î". 

 = Fucus leptophyllus Küxz.: Tal>. Pliyc. X. p. G. Taf. \'2. ïv^. i\'. — 

 ])ifKii:: Alg. .Jap. in .Tourn. Liiiii. S(jc., Jîotaiiy. \'ol. XV. 

 p. -^öi). 



1) StkömI'I'ki.t : Oui Algvef^eialioii viil Ishiiuls Kiisler, p. oö. 



