Clavella applicata n. sp. and C. caudata n. sp. are described and illustrated. Both species are parasitic on the fins (the latter also on the inner surface of the operculum) of Anisotremus scapularis (Tschudi), an inshore teleost fish from Antofagasta, Chile. Both new species can be distinguished from their congeners, and from each other, by various details of their appendages. C. caudata is unique in possessing modified uropods. The dorsal position of these appendages suggest that the Clavella-branch of Lernaeopodidae is related more closely to the Charopinus-branch than to Brachiella-branch of the family. C. parva Wilson, 1912, is recorded for the first time from Chilean waters, where it was found on the caudal fin of Mugiloides chilensis (Molina). ac]19840504