Identification and Constitution of Fremy's Sulphazotised 

 Salts of Pottasium, his Sulphazate, Sulphazite, etc. By 

 E. Divers, M.D., D. Sc, F. R. S., EiiK^ritus Prof., and T. Haga, 

 D. Sc, F. C. S., Professor, Tokyo Imperial University 225 



On a Specimen of a Gigantic Hydroid, Branchiocerianthus 

 imperator Allmati), found in the Sagami Sea. By M. 

 MiYAJiMA, Rigakushi, Science College, Imperial University, 

 To^ {With Plates XIV & XV) 235 



Mutual Relations between Torsion and Magnetization in Iron 

 and Nickel Wires. By H. Nagaoka, Rigakuhakushi, Pro- 

 fessor of Applied mathematics, and K. Honda, Rigakushi, 

 Post-graduate in Physics. {With Plates X^VÎ) 263 



The Interaction between Sulphites and Nitrities. By E. 

 Divers, M. D., D. Sc, F. R. S., Emeriti s Prof., and T. Haga, 

 DTSc. F. C. S., Professor, Tokyo Impenal University 281 



Pt. III. Published Dec. 28th, 1900. 



Contributions to the Morphology of Cyclostomata. II. — The 

 Development of Pronephros and Segmental Duct in Petromyzon. 

 By S. Haïta, Professor in the College of Peers, Tokyo. {With 

 Plates XVII-XXI) 311 



Beiträge zur Wachstumsgeschichte der Bambusgewachse. 



Von K. Shibata, Rigakushi. {Mit Tafeln XXII- XXIV) ... 427 



Decomposition of Hydroxyamidosulphates by Copper 

 Sulphate. By E. Divers, M. D., D. Sc, F. R. S., Emeritus 

 Prof., and T. Haga, D. Sc, F. C. S., Professor, Tokyo Imperial 

 University 497 



Pt. IV. Published Oct. 5th, 1901. 



Observations on the Development, Structure and Metamor- 

 phosis of Actinotrocha. Iwaji Ikeda, Rigakushi. {With 

 Plates XXV-XXX) 508 



PKINTED AT THE -'TOKYO TSUKIJI TYPE FOUNDRY.' 



1.T3J 



