No.1
Itagaki, Hiroshi & Genshiro Imai
The species and distribution of the freshwater snails of the genus Lymnaea in Hokkaido.
Bulletin of the Biogeographical Society of Japan, 23: 1-8, pl.1.
No.2
黒田 長禮
飼養野生カモ類の習性の調査.
Bulletin of the Biogeographical Society of Japan, 23: 11-15.
No.3
黒田 長禮
飼養野生カモ類の換羽の調査.
Bulletin of the Biogeographical Society of Japan, 23: 17-24.
No.4
Okada, Yaichiro & Tamotsu Kakuda
Studies on the Japanese serow, Capricornis crispus (Temminck).
Bulletin of the Biogeographical Society of Japan, 23: 17-21, pls.1-5.
No.5
Gamo, Sigeo
A new cumacean Crustacea, Cumella aveata sp. nov., from Sagami Bay.
Bulletin of the Biogeographical Society of Japan, 23: 23-28.