rill': im'caci'.t; or .tapw. v» 



Ja])an, where tlic currents jneet, are dreaded l)v mariners on 

 account of the rough water. 



The other eokl current conies down along; the west coast 

 of Saglialiii Island, washing; the east coasts of Sil)eria and Korea. 

 Of this current only a small i)i)rtion touches the west coast of 

 Hokkaido as an undercurrent. Thus the Jajian Sea, with the 

 subtro])ical current on the Japanese side, and the arctic on the 

 Siberian side, shows remarkable climatic differences at places 

 ha vino- the same latitude. Otaru, wdiere ice is unknown in the 

 harbour, lies on the same parallel with Yladivostock, ice-blockaded 

 for nearly half the year. 



Hakodate, situated on the Tsugaru strait between the ^fain 

 Island (Honshu) and Hokkaido, has an especially interesting flora. 

 A l)ranch of the eastern cold current escajies to the Japan Sea, 

 washing the Hokkaido side of the strait, and the western warm 

 current enters the same strait along the Honshu shore." 



The following table is to illustrate the specific distribution 

 of Fucacea^ along the whole coast of Japan. The localities 

 are arranged in order beginning at the southern part of the 

 Japan Sea side and going northwards, including almost all 

 ])rovinces on that side as far as Saghalin, tlience turning to 

 the Ochotsk coast of Hokkaido and the Kuriles. In the 

 next, the Pacific coast of the Kuriles comes first and the rocky 

 shores of Hokkaido, the Main Island, Shikoku, and Kiushiu 

 are traced jirovince after province southwards. Two pro- 

 vinces, Oshima in Hokkaido, and Mutsu in the IMain Island 

 are mentioned twice, these provinces being separated by the 

 Tsugaru strait through which the two great ocean currents 



1) For precise accounts of tlie currents of llie Tsugaru strait, see: — Y endo; Cause of 

 the decrease of seaweeds in the Prefecture of Aoniori (Jonrn. of the Imp. Fisch. Bureau) 

 Vol. XII. No. 2. pp. r,r,-<,7. 



