THE FUCACEyK OF J A l'A N. 101) 



paloiiliii'ss of llu' lateral hraiichcH, tlic iiumhor oi" tlu; sj)in()U.s 

 processes on the stems, ete., iire also quite unreliable cliaractei-s. 



The present forma may be separated from the type to some 

 extent by having the basal leaves mostly lanceolate, with the rib 

 extending nearly to the ai)ex of each, and irregularly serrated at 

 the margin. In some of the specimens from the vicinity of the 

 Otaru Bay, the serrature on the leaves is remarkably regular; 

 yet plenty of specimens from other localities serve to link them 

 with those having entire spathulate leaves. Linear-spathulate, 

 ribbed leaves are not uncommon in the upper portions of the 

 present forma. AVhen the basal leaves have fallen off this and 

 the typical forma are often hardly distinguishable. 



Remark on the synonymy. The original diagnosis of Sar- 

 (jassum vaUduni is at once applicable to both Sargassum confusum 

 and Sargassum fuhellum in the specific concej)tion taken in the 

 present paper. »J. xVgaedii described Sargassum validum from 

 the material collected by Kjellman at Hakodate. Sargassum 

 fulvellum seems to be limited to the warmer parts of Japan, and 

 its occurrence in the vicinit}^ of Hakodate seems to me very 

 doubtful; while Sargassum confusum, is commonly found along 

 the coast of Hokkaido (Yesso). Hence I choose to refer the 

 questionable species, Sargassum validum, rather to the northern 

 species. 



Fucus paUidus Turn, is a problematic species. »F. Agardh^^ 

 once referred it, though with doubt, to Sargassum énerve, but he 

 neglected it in his later works. Referring to Tuexek's Hist. 

 Fuc. 1. c, 1 believe that it may be identical with the present 

 species. The figure of Halochloa pallida in Tab. Phyc. X. Taf. 



1) Spec. Alg. I. p. 294. 



