Two instances of clinostomid trematodes presumed to be aberrant parasites in the mouth of domestic cats are recorded from Lydenburg and Durban. These trematodes are considered to belong to a new species and are described under the name Clinostomum falsatum sp. n. The chief characteristics are the small size, being less than 5 mm long, the somewhat flattened disk-like testes, a well developed uterine sac which may extent over the ventral sucker and the median opening of the genital atrium. As only a limited number of transverse sections of the Durban worms are available, they are not specifically determined. They, however, show a close relationship to C. falsatum.