Abstract
Since the publication of a paper by Bassett-Smith (1896, Journ. Mar. Biol. Assoc. n.s. IV. 155) a considerable number of new species and other species of parasitic Copepoda has been taken at Plymouth. Bassett-Smith's work forms the basis of this list, but some species are now assigned to other genera, or degraded as synonyms, while in some cases the names of genera are changed owing to preoccupation. Additions have been made by the collections of L. Harrison Matthews and myself.