thj: 1 rcAcK.iî oi .1 ai-an. 11 



l'cinus of the I'ncil'u' and o\' tlic JajKiii Sen side of iiiiddk; .Ia])aii. 

 Lall' ill tlie 8])riiii;- these species are found in such hixui'iance 

 that fisheiinen experience cüiisiderablc trouble iu ruiiniug their 

 boats over tlie dense vegetation. On the northeast coast of 

 Hokkaido none of these species occur even scantily, but instead 

 of them ()/6lu/)ht/lliiin crassipes and 0. geniinatum are found in 

 sitnihir hixuriance. In »I une, the port of Nemuro is so ßlled 

 u}) with ('. vrass'ipcs that a steam launch can hardly navigate 

 the part without the blades of its propeller becoming entangled 

 in the fronds of the weed. 



3. The strait of Tsuo;aru is an outlet of the Tsushima 

 current from the Japan Sea to the I\icific Ocean. This is 

 satisfactorily illustrated in the table. Coccophora Langsdorfil has 

 been reported from the provinces of Echigo, Sado, and Noto, 

 all on the coast of the Japan Sea. The present writer found 

 the same spacies along both sides of tlie above mentioned strait 

 and eould trace it to the Pacilic coast of the Province of Mutsu. 

 Again Sarc/assum confusum is found in the Japan Sea in con- 

 siderable quantities. On the Pacilie coast, however, it is conlined 

 to the provinces of Mutsu and Ivikuchu ; both provinces are on 

 or near the outlet of the strait on the Pacific side. 



4. The coasts of the Inland Sea which is surrounded by 

 Shikoku, Kiushiu and the western part of the Main Island, were 

 known to us to be poor in alga*. X few species of Sargaatium 

 and Ct/6loj>hi///(/iJi, willi badly developed fronds, were the only 

 specimens I could get from that sea. 



5. Cysloseira is conlined to the Loochoo archipelago ; and 

 Ot/aloscira Sonderl was i-ei)orted l)y Dickie from the southern 

 end of the Province of Kii. The occurrence of this same 

 species there is to be doubted, as noliody else has collected the 



