FLAGELLATE • E-FREE TRANSLATION.COM • Definition of Flagellate

... became longer than the rest; the body became more swollen; the pseudopodia were gradually drawn in, with the exception of the more elongate one; this became active in movement and finer in diameter, until ultimately it formed a single flagellum at the anterior of a small monadiform flagellate. The process was repeated two or three times under my observation, so that I am convinced that it was not a developmental form of some rhizopod. Several of them were seen at different times during the summer, and they were always of the same size and form in the flagellated ...

— Marine Protozoa from Woods Hole - Bulletin of the United States Fish Commission 21:415-468, 1901 • Gary N. Galkins