Berthella tupala Er. Marcus, 1957 (original description)
Catriona tina Er. Marcus, 1957 accepted as Cuthona tina (Er. Marcus, 1957) (original description)
Cratena kaoruae Er. Marcus, 1957 accepted as Cratena pilata (A. Gould, 1870) (original description)
Doto caramella Er. Marcus, 1957 (original description)
Elysia cauze Er. Marcus, 1957 accepted as Elysia subornata A. E. Verrill, 1901 (original description)
Embletonia evelinae Er. Marcus, 1957 accepted as Miesea evelinae (Er. Marcus, 1957) (original description)
Hallaxa apefae Er. Marcus, 1957 (original description)
Hancockia ryrca Er. Marcus, 1957 (original description)
Lomanotus phiops Er. Marcus, 1957 (original description)
Nanuca Er. Marcus, 1957 (original description)
Nanuca sebastiani Er. Marcus, 1957 (original description)
Okenia evelinae Er. Marcus, 1957 accepted as Bermudella evelinae (Er. Marcus, 1957) (original description)
Okenia impexa Er. Marcus, 1957 accepted as Cargoa impexa (Er. Marcus, 1957) (original description)
Polycera aurisula Er. Marcus, 1957 (original description)
Polycerella conyna Er. Marcus, 1957 accepted as Polycerella emertoni A. E. Verrill, 1880 (original description)
Stiliger vanellus Er. Marcus, 1957 accepted as Ercolania fuscata (A. Gould, 1870) (original description)
Trapania maringa Er. Marcus, 1957 (original description)
Tridachia whiteae Er. Marcus, 1957 accepted as Elysia crispata Mörch, 1863 (original description)