98 AKT. V2. K. YENDO. 



suspected. The cliaracter' of the vesicles which the former writer 

 pointed out in distinguishing both are demonstratively unreliable. 



J. Agardh^^ and De Tont"^ remarked that the present species 

 has a close affinity to Sargassum fahellum Ag. and the former 

 Avriter once united Sponcmyus enei'vis Kütz. with it. Both are, 

 indeed, nearly related, but may be easily distinguished ])y various 

 points as already mentioned under the preceding species. 



J. AgaPvDH"^ relates that the plant which he received from 

 Martens with the name of Fvcus 2^(i'i^idus is equal to Sargassum 

 énerve Ag., while the plant described and figured by TrRXER in 

 Hist. Fuc. Vol. I. t. 67 bearing the former name is quite different 

 from the latter. The figures of Fucus pallidus illustrated by 

 Turner, 1. c, and of Halochloa pallida by Kützing in Tab. Phyc. 

 X. 94. II. do not coincide with the present species in several 

 important characters. These figures, incomplete as they are, are 

 rather referable to Sargassum jjiluliferum Ag. or a variety of it. 



O'KuNTZE^^ remarks that Sargassum énerve is a hybrid be- 

 tween Sargassum vulgare and Sargassum Horneri. On what 

 ground his opinion is based is beyond our imagination. 



Localities: Chikuzen Prov. (M. Yano) (! ) ; Korea (Tilesius) ; 

 Hagi, Iwami Prov. (J. Nikai); Izumo Prov. (!); Tango Prov.(!); 

 Noto Prov. (!); Kikuzen Prov. (!)! Öhimösa Prov. (!); Boslui 

 Prov. (!); Sagami Prov. (!); Izu Prov. (!); Shima Prov. (!); Kii 

 Prov. (!); Awa Prov. (!); Sanuki Prov. (!); Bungo Prov. (!); 

 " Everywhere along the coast of the Pacific Ocean and the Japan 

 Sea" (Ok AMUR a). 



1) Spec. Surg. Austr. [>. Gl; — Spec. Alg. I. p. 2i)4. 



2) Pliyc. Jap. Nov. p. 45. 

 ?>) Spec. Alg. I. p. 294. 



4) Revisio von Sarg. p. 222. 



