IP o s t e I 3 i a 183 



The whole algal region of Japan 

 may be briefly divided as follows : 



(a) Pacific side. 



i. From Kurile islands to 

 Kinkwa-san island. 



2. From Kinkwa-san island to 

 the southern end of Kiu- 

 shu island. 



3. From the southern end of 

 Kiushu island to Formosa. 



(b) Japan Sea side. 



1. From Iki island to Ojika 

 peninsula. 



2. From Ojika peninsula to 

 the north. 



(a) Pacific side. 1. From Kurile 

 islands to Kinkwa-san island. 



In this region we find a subarctic 

 flora, although a gradual change may 

 be noted from one extremity to the 

 other. The gigantic Porphyra (Diplo- 

 dermd) y Thalassiophyllum, Arthrotham- 



