﻿PREFACE. 



It was indeed 1689 that, with Kaempfers visit to this 

 country, our algae were for the first time subjected to the study 

 of scientific world of Europe. Since this time, not a little number 

 of our algae have been brought away to Europe by several 

 tourists and collecters, and such men as Harvey, Martens, 

 Suringar, Kjellman, Hariot and de Toni may be mentioned 

 among many others, who have studied our native algae and iden- 

 tified them. In 189 r, Hariot published his " Liste des Algues 

 Marines rapportees de Yokoska, in which he mentions that 

 233 species were already known up to the date of his publica- 

 tion, and by his adding 2 1 new species, the total number becomes 

 254. In 1895, G. B. de Toni published his <( Phyceae Japonicae 

 Novae, M in which he enumerates 305 species, some of which 

 were identified according to the specimens I sent him. 



Since 1888, when I， as the first student on our marine 

 algse amongst us, began my study, more than 350 species were 

 studied, not a few of which are new species and, I doubt not, 

 may be more or less interesting to the algologists in abroad. 

 Now the main object of publishing* this work is both to promote 

 this branch of science in this country and to make our marine 

 algae more familiar to those Avho are interested in this study 

 as well as to the algologists of the world at large. 



Here, I want to add a few words that we are not placed 

 in very favourable condition of studying algae by any means, 

 especially from the lack of algological literature and reference 

 specimens. For, as there is not yet any provision whatever 

 made in the Imperial University of Tokyo nor in any other 



