One new palaeonemertean (Tubulanus roretzi sp.n.) and five new heteronemertean species {Cerebratulus aracaensis sp.n., Paracerebratulus adriaticus gen. et sp.n., Lineus frauenfeldi sp.n., L. fischen sp.n., Utolineides alba gen. et sp.n.) are described and illustrated. Borlasia bilineata SCHMARDA, 1859, Cerebratulus roseus (DELLE CHIAJE, 1841), Lineus schmardai BÜRGER, 1904, and Nemertes collaris SCHMARDA, 1859 are redescribed. Borlasia bilineata is transferred to the genus Baseodiscus DIESING, 1850 and Lineus schmardai to Myorhynchonemertes gen.n. as M. striata (SCHMARDA, 1859) comb.n.