Seven genera of helminths (two of Digenea, one of Cestoda, and two each of Nematoda and Acanthocephala) and one species of parasitic copepod were recovered from 40 longnose suckers (Catostomus catostomus) and five white suckers (Catostomus commersoni), caught at two localities in Labrador, during August and September 1969. The helminths reported include five new host records.
Pellucidhaptor catostomi n.sp., recovered from the nasal cavities of longnose suckers, Catostomus catostomus (Forster), and Pellucidhaptor nasalis n.sp., recovered from the same site in white suckers, Catostomus commersoni (Lacépède), are described.