Kent, W.S., 1880
Kent, W.S. (1880). A manual of the Infusoria; including a description of all known flagellate, ciliate and tentaculiferous Protozoa, British and foreign, and an account of the organisation and affinities of the sponges. Vol. 1 pp. [x], 1-144, 8 plates. London: David Bogue.
Pages [i-x] published in May 1882.