Specimens of Parapholis strigosa (Dum.) Hubb. collected in a salt-marsh on the Frisian island of Vlieland appeared to be infected by a nematod worm, probably Anguina agrostis (Steinb.). This parasite causes swelling of the ovaries of grasses. No earlier records of Anguina agrostis on Parapholis strigosa are known, but the parasite has been reported from several other grasses.