Abstract
During 1952–54, fishes were collected and examined for parasites (particularly those of the blood and gills) at various localities ranging from Sydney, Australia, through the island groups of Melanesia to Tarawa, Gilbert and Ellice Islands Colony. Most of the specimens were obtained by poisoning intertidal zone pools on coral reefs or rocky coasts, the remainder being from fresh-water or brackish sources. A total of 1121 fishes of at least 122 species, 63 genera, and 27 families were dealt with. This paper, the first of a series detailing the findings, includes a complete list of the material, an account of the techniques employed, and new host and locality records for Haemogregarina bigemina Laveran and Mesnil and H. mugili Carini.