May 31st, 1912. Vol. XXX, Art. 2. 



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JOURNAL 



OF THE 



COLLEGE OF SCIENCE, 



IMPERIAL UNIVERSITY OF TOKYO. 



A. Izuka: 



The Errantiate Polyehaeta of Japan. 



!Viuse^-- 



TOKYO, 



PUBLISHED BY THE UNIVERSITY. 



MEIJI XLV 



