Aplysia sagamiana Baba, 1949 (original description)
Armina appendiculata Baba, 1949 (original description)
Armina major Baba, 1949 (original description)
Baeolidia fusiformis Baba, 1949 accepted as Limenandra fusiformis (Baba, 1949) (original description)
Bornella japonica Baba, 1949 accepted as Bornella hermanni Angas, 1864 (original description)
Ceratosoma bicolor Baba, 1949 (original description)
Chelidonura inornata Baba, 1949 accepted as Mariaglaja inornata (Baba, 1949) (original description)
Cratena anulata Baba, 1949 accepted as Trinchesia anulata (Baba, 1949) (original description)
Cratena pinnifera Baba, 1949 accepted as Catriona pinnifera (Baba, 1949) (original description)
Cratena venusta Baba, 1949 accepted as Catriona venusta (Baba, 1949) (original description)
Crimora lutea Baba, 1949 (original description)
Dendronotus gracilis Baba, 1949 (original description)
Dermatobranchus multidentatus Baba, 1949 (original description)
Dermatobranchus nigropunctatus Baba, 1949 (original description)
Dermatobranchus sagamianus Baba, 1949 (original description)
Dermatobranchus semistriatus Baba, 1949 (original description)
Dermatobranchus striatellus Baba, 1949 (original description)
Dermatobranchus substriatus Baba, 1949 (original description)
Doto (Doto) bella Baba, 1938 accepted as Doto bella Baba, 1938 (additional source)
Doto (Doto) japonica Odhner, 1936 accepted as Doto japonica Odhner, 1936 (basis of record)
Doto (Doto) purpurea Baba, 1949 accepted as Doto purpurea Baba, 1949 (original description)
Doto (Doto) rosacea Baba, 1949 accepted as Doto rosacea Baba, 1949 (original description)
Doto (Gellina) pacifica Baba, 1949 accepted as Doto pacifica Baba, 1949 (original description)
Elysia (Elysia) trisinuata Baba, 1949 accepted as Elysia trisinuata Baba, 1949 (original description)
Elysia splendens Baba, 1949 accepted as Thuridilla splendens (Baba, 1949) (original description)
Eubranchopsis Baba, 1949 accepted as Eubranchus Forbes, 1838 (original description)
Eubranchopsis virginalis Baba, 1949 accepted as Eubranchus virginalis (Baba, 1949) (original description)
Facelinella Baba, 1949 accepted as Facelina Alder & Hancock, 1855 (original description)
Facelinella anulifera Baba, 1949 accepted as Phidiana anulifera (Baba, 1949) (original description)
Favorinus japonicus Baba, 1949 (original description)
Favorinus perfoliatus Baba, 1949 (original description)
Glossodoris florens Baba, 1949 accepted as Thorunna florens (Baba, 1949) (original description)
Glossodoris maritima Baba, 1949 accepted as Hypselodoris maritima (Baba, 1949) (original description)
Glossodoris placida Baba, 1949 accepted as Hypselodoris placida (Baba, 1949) (original description)
Goniodoris felis Baba, 1949 accepted as Pelagella felis (Baba, 1949) (original description)
Gymnodoris subflava Baba, 1949 (original description)
Halgerda rubicunda Baba, 1949 accepted as Sclerodoris rubicunda (Baba, 1949) (original description)
Hervia affinis Baba, 1949 accepted as Cratena affinis (Baba, 1949) (original description)
Hervia serrata Baba, 1949 accepted as Phyllodesmium serratum (Baba, 1949) (original description)
Kaloplocamus acutus Baba, 1949 (original description)
Madrella gloriosa Baba, 1949 (original description)
Madrella granularis Baba, 1949 (original description)
Noumea parva Baba, 1949 accepted as Verconia parva (Baba, 1949) (original description)
Noumea purpurea Baba, 1949 accepted as Verconia purpurea (Baba, 1949) (original description)
Okenia echinata Baba, 1949 (original description)
Okenia japonica Baba, 1949 accepted as Bermudella japonica (Baba, 1949) (original description)
Paratritonia Baba, 1949 (original description)
Paratritonia lutea Baba, 1949 (original description)
Polycera japonica Baba, 1949 (original description)
Stiliger (Ercolania) smaragdinus Baba, 1949 accepted as Sacoproteus smaragdinus (Baba, 1949) (original description)
Subcuthona Baba, 1949 (original description)
Subcuthona pallida Baba, 1949 (original description)
Tritoniopsilla alba Baba, 1949 accepted as Tritoniopsis elegans (Audouin, 1826) (original description)

Japan for Elysia (Elysia) trisinuata Baba, 1949 
Japan for Eubranchopsis virginalis Baba, 1949 
Japan for Madrella gloriosa Baba, 1949 
Japan for Madrella granularis Baba, 1949 
Japan for Subcuthona pallida Baba, 1949 
Japanese part of the North Pacific Ocean for Stiliger (Ercolania) smaragdinus Baba, 1949  (origin: native - non-endemic)
Malacca Strait for Sacoproteus smaragdinus (Baba, 1949) 
Sagami Bay for Doto (Doto) purpurea Baba, 1949 
Sagami Bay for Doto (Doto) rosacea Baba, 1949 
Sagami Bay for Doto (Gellina) pacifica Baba, 1949 
Sagami Bay for Elysia splendens Baba, 1949 
Taiwanese Exclusive Economic Zone for Thuridilla splendens (Baba, 1949)