

CONTENTS. 



Part IV. (Vol.1.) 



Page. 



Über einige Tricladen Europa's. By Isao Ijima, Ph. D., Professor of 



Zoology, Imperial University. (Plate XXV.) 337 



A Model showing the Motion of an Earth-particle during an Earth- 

 quake. By Seikei Sekiya, Professor of Seismology, Imperial Univer- 

 sity. (Plates XXVI-XX VII.) 359 



On Aluminium in the Ashes of Flowsring Plants. By Hikorokurô 



YosHiDA, F.C.S., Assistant Professor of Cliemistry, Imperial University 3G3 



The Effaots of Dilution and the Presence of Sodium Salts and Carbonic 

 Acid upon the Titration of Hydroxyamine by Iodine. By 



ÏAMEMASA Haga, F. G. S., Assistaut Professor of Cliemistry, Imperial 

 University 369 



Notes on a Large Crystal Sphere. By C.argill G. Knott, D. Sc, F.E.S.E., 



Professor of Physics, Imperia"! University 377 



The Marine Biological Station of the Imperial University at 



Misaki. Kakichi Mitsukuri Ph. D., Professor of Zoology, Imperial 

 University (Plates XXVIII-XXIX.) 381 



THF. SF.ISHimiNSHA, TÛKÎ 



