178 THE BOTANICAL MAGAZINE. LVoi. xxxn. No. sso. 



refer to, the number of marine algae, excluding Cyanophyceas 

 and Bacillariaceas, recorded up to date for Japan, amounts 258 

 brown, 207 green and 580 red —1045 in all. About 260 of 

 them have been added by myself. This speedy increase of num- 

 ber is ofcourse mainly due to the progress of the investigation, 

 but no one will be able to point out of them the immigrants 

 to Japan carried by the steamers. 



The two examples mentioned above persuade us to admit 

 that some European algae might have been introduced into 

 Japan. These, however, may not count very many./ The 

 majority of the 38 species must be regarded as common in both 

 the Pacific and the Atlantic Ocean. A more thorough research 

 of the Indian Ocean may perhaps throw a more light for the 

 solution of the problem. 



Beside the 38 European species, the present Notes contain 

 21 species hitherto known from the north-western region of the 

 North America only, 18 species from the Indian Ocean and the 

 southern China, and 28 species from New Zealand and Australia. 

 These discoveries may alter the opinions of some algologists 

 who are inclined to take the Japanese water as an isolated or 

 detatched floristic region, or at least may convince them of a 

 more intimacy between the Japanese and the foreign algal floras. 



A comparison of the Japanese algal feature with more 

 detailed data -with that of other parts of the world will be 

 interesting and welcome to botanists. As a concluding remark 

 of the present Notes, however, I shall here confine mj-self in 

 mentioning as above the general characters of the species re- 

 ported in them. 



Addenda. 



Under Lomentaria umbellata H. et EL, Notes V., p. 258, 

 Catenella procera J. Ag. : Anal. Alg. II, p. 74— Toni : Syll Alg., 

 IV, p. 321, should be brought in the synonymous position. 

 The original specimen at Lund can never be specincalty different 

 from that of Chylocladia Ramsayana J . Ag. What the describer 

 takes as cystocarpic ramulets are nothing but stichidia. 



Sapporo, 21. May, 1918. 



