Abstract

Through the kindness of Dr. AKAMARO TANAKA and Mr. RYÛITI HOSINO, I have been enabled to examine some microscopical plants which were collected in September of 1933 by them in Itibisinai-ko, a mineralogenous acidotrophic lake, in Kunasiri-zima of the South Kurile Islands and have found 3 diatoms, viz. Pinnularia Braunii, Pinnularia Braunii var. amphicephala, and Eunotia septentrionalis. Among them, a number of abnormal specimens of Eunotia have been found.

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