Baba, K. 1940. Some additions to the nudibranch fauna of the northern part of Japan. Bulletin of the Biogeographical Society of Japan 10(6):103-111. 4
- Aldisa sanguinea (Cooper, 1873)
- Okenia distincta n. sp.
- Duvaucelia (Duvaucelia) undulata O'Donoghue, var. muroranica n. var.
- Cuthona (Cuthona) osyoro n. sp.
- Cerberilla asamusiensis n. sp.
