THE FUCACEJi OF JAl'AN. 133 



Sargassum vi'istœfollunt Ag. 



Spec. p. 13.— /rf.: System, p. 2'J7.— J. Ag.: Spec. Al^^ I. p. .325.— /(/.: 

 Spec. Sarg. Austr. p. 91.— Reinb.: Sarg. v. lud. Arch. p. 70.— Dk 

 Toni: Syll. Alg. III. p. 52.— Yendo: Prelim. List of Fuc. Jap. p. 

 158. (cxcl. sijn.). 

 'i=Sargassum duplicatum Bory: Voy. Coquil. No. 22. 



In 1900, I found a Sargassum species in Hiuga Prov., which 

 had tliick, leather-Hke, "duplicate" leaves and seemed to answer 

 to the remark on Sargassum cristcefoliwn given by Keinbold in 

 Sarg. V. Ind. Arch. p. 71. Unfortunately my specimens were all 

 sterile, and as I was not without doubt about the species, one of 

 the specimens was sent to the author of the above mentioned 

 paper for examination. He kindly examined the specimen, com- 

 pared it with the authentic specimens kept in Binder's herbarium, 

 and wrote me that the plant I had sent him was referrible, 

 though provisionally, to Sargassum crista' folium Ag. and that it 

 had a close resemblance to Sargassum duplicatum Boky., as well 

 as to Sargassum cristœfolium var. Upolense Gkun. 



J. Agardh^^ refers, with some degree of doubt, Sargassum 

 duplicatum Bory. to his Sargassum beriberifolium. The relation 

 between the two species will be discussed under the next species. 



Localities: Bindare Isl., Hiuga Prov. (Î); Numazu, Suruga 

 Prov. (h.s.a.). 



Sargassiini beriberlfoliiun J. Ag. 

 Plate XVI. Pig. 10-14. 



Spec. Alg. I. p. 337.— /f/.: Spec. Sarg. Austr. p. DO. Tab. XXVI. fig. 

 v.— De Toxi: Syll. Alg. III. p. 50. 



1) Spec. Sarg. Austr. p. 12Ü. 



