Opisthobranchs (Molluscs: Gastropodal from Ullung and Dog-do Islarlds, Korea

울릉도 및 독도산 후새류(연체동물 문: 복족 강)

Fifteen species in 10 families of Opisthobranchia were collected from Ulung and Dog-do Islands, Korea. Eight species of them, Cadlina japonica Baba, Aldisa cooperi Robilliard & Baba, Dendrodoris denisoni (Angas), Tritonfu festive (Steams), Notobryon mardi Odhner, Hermissendo crussicornis (Eschscholtz), Sakuraeolis monesto (Bergh) and Protaeolidiella atru Baba were not recorded in Korean waters previously. In addtion to these 8 species, 5 species of Aplvsia purvufa Guilding in Miirch, Bethellino citrine (Riippell & Leuckart), Pfeurobronchoeo iaponica Thiele, Chromodoris tinctorio (Ri'spell & Leuckart), and Hypselodoris festive (A. Adams) are new to the fauna of Ullung and Dog-do Islands.