Three poorly known bucephalid species are described from off Corsica, in the Western Mediterranean Sea. Bucephalus gorgon (Linton, 1905) (syn. B. introversus Manter, 1940) from Seriola dumerili is reported for only the third time in the Mediterranean Sea. Prosorhynchoides arcuatus (Linton, 1900) from Sarda sarda is reported for the first time from the Mediterranean Sea. P. tergestinum (Stossich, 1883) n. comb. (originally in Gasterostomum von Siebold 1848; has also been in Bucephalopsis Diesing, 1855 and Bucephalus von Baer, 1827) from Gobius geniporus is reported for only the second time.