I.  Hayami, ?Liassic Bekevellia in Japan. (Studies on the Liassic pelecypods in Japan, 1)?, Japanese Journal of Geology and Geography, vol. 28, pp. 47-59, 1957.

I.  Hayami, ?Liassic Gervillia and Isognomon in Japan (Studies on the Liassic pelecypods in Japan, 2)?, Japanese Journal of Geology and Geography, vol. 28, pp. 97-106, 1957.

I.  Hayami, ?Liassic Volsella, Mytilus and some other dysodont species in Japan?, Transactions and Proceeddings of the Palaeontological Society of Japan, New Series, vol. 29, pp. 155-165, 1958.

I.  Hayami, ?Liassic Bekevellia in Japan. (Studies on the Liassic pelecypods in Japan, 1)?, Japanese Journal of Geology and Geography, vol. 28, pp. 47-59, 1957.

I.  Hayami, ?Liassic Gervillia and Isognomon in Japan (Studies on the Liassic pelecypods in Japan, 2)?, Japanese Journal of Geology and Geography, vol. 28, pp. 97-106, 1957.

I.  Hayami, ?Liassic Volsella, Mytilus and some other dysodont species in Japan?, Transactions and Proceeddings of the Palaeontological Society of Japan, New Series, vol. 29, pp. 155-165, 1958.