Trypanosoma catostomi n. sp. from the White Sucker Catostomus c. commersoni (Lacépède)*

SYNOPSIS. Trypanosoma catostomi n. sp. is described from the blood of the white sucker Catostomus c. commersoni (Lacépède) from southeastern Michigan. Two methods of fixation, wet and dry, are compared for their effect on body measurements. The type of fixation used affects the length of the free flagellum. Significance of this finding is discussed.