132 ART. 12. K. YENDO. 



of which I have obtained through the kindness of Major Kein- 

 BOLD. The leaves in the present plant are soft and membrana- 

 ceous, sometimes " duplicated " but often not, and turn a 

 brownish colour on drying. The receptacles are less densely 

 aggregated and are frequently isolated by a short stalk, partly 

 exhibiting a character of the Biserruke. Dentated and smooth 

 recej)tacles are mingled together in the same individual or even 

 in the same ramulet. These points remind one of Sargassum 

 oocyste var. conchq^Hcatum J. Ag. (in Spec. Alg. I. p. 317, but 

 struck out in Sarg. Austr.). 



J. Agardh established a new species in Sarg. Austr. p. 90, 

 calling it /Sargassum diiplicahim, reducing Sargassum Ilicifolium 

 var. duplicalum, Sargassum cristœfoUum Harv. and Sargassum 

 Pfeifferœ Grun. to the synonyms. It is very doubtful, how- 

 ever, whether the plant on which the new species was based 

 is identical with all of the synonymized species. There is reason 

 to believe that the plant probably differed from Sargassum Ilici- 

 folium var. duplicalum as he says : — " Folia, ad basem vix sunt 

 excisa, hinc in vicinia Sargassum Ilicifolia vix disponenda ; folia 

 in hac prœterea sunt niulto tenuior, fere membranacea dicenda,... 



" I prefer to retain here the old name as has been done 



by Reinbold. 



A specimen from Kashiwajima in Tosa Prov., has all its 

 characters similar to the plant in question, except that the 

 receptacles are never sejmrated from one another by the stalk 

 and are minutely spinulated without exception. It is a J. Unfor- 

 tunately we have only one fragmentary piece and further dis- 

 cussion is impossible at 2)rcsent. 



Localities: Hiratsuka, Saganii Prov'.(!); Tosa Prov. (ii.s.a.). 

 Boshfi (Ok AMUR a) (!). 



