Abstract
Twenty-five fish of two species (Cottus bairdi, 10; Myoxocephalus quadricornis, 15) were collected at three locations in Labrador during August and September, 1969. Three new species of Gyrodactylus, namely Gyrodactylus labradorius n. sp. and G. lacusgrandis n. sp. from C. bairdi and G. nainum n. sp. from M. quadricornis, are described and figured.

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