THE FUGACES OF JAPAN. 95 



of the subordinate branclilets. It must be remembered that the 

 next sjieeies has leaves absolutely destitute of midrib, and that its 

 fronds are very liable to lose colour when cast ashore. The 

 figure, indeed, of Inicits fulvellus illustrated by Turner is 

 apj^licable to both this and the following species. The greater 

 part of the description by Turner also applies to both plants. 

 But he notes that the plant does not adhere in the least to 

 the paper. Sargassum énerve is remarkable for adhering closely 

 to the paper on drying, while the plant here treated never 

 does so. 



J. Agardh^^ remarks that the vesicles of the present species 

 are mucronated; and De Toni-^ notes that the mucronatioa 

 measures 2.2mm. In our plant, however, as has been shown 

 above, most of the vesicles are entire at the top, and mucronated 

 ones are rather uncommon. They say also, "folia vix uncialia, 

 paullo ultra 3 mm " This remark applies to the upper por- 

 tions only of the frond of this plant. 



It is to be remembered that the present writer has never 

 seen an authentic specimen of either Turner's or J. Agardh's. 

 There is, therefore, no little danger in disputing the former 

 descriptions; but it may be said with safety that in Japan 

 we find no other plants than the one now described and the 

 next one which presents a close agreement with the descriptions 

 of Sargassum falvellum Ag. 



Localities: Nagasaki (Martens), Ilizen Prov. (!); Iwami 

 Prov. (!); Izumo Prov. (!); Tango Prov. (!); Sado Prov. (!). 



1) Spec. Alg. I. p. 293-294. 



2) Syll. Alg. III. p. 25. 



