Reference

Yoshine Hada (1937): The fauna of Akkeshi Bay IV. The pelagic Ciliata – Journal of the Faculty of Science, Hokkaido University. Ser.IV, Geol.and Min. 1930- . Ser.V, Botany. 1930- Ser.VI, Zoology.Vol.1 No.4 - 1932- – 5: 143 - 216.