Papers on North American Parasitic Copepods: 1, North American parasitic copepods of the family Argulidæ with a bibliography of the group and a systematic review of all known species. 2, The newly hatched larva of Argulus megalops. 3, A new species of Argulus with a more complete account of two species already described. 4, North American parasitic copepods belonging to the family Caligidae : a revision of the Pandarinae and the Cecropinae. 5, North American parasitic copepods belonging to the Lernaeopodidae