Date of this Version
During January, February, and March of 1934 it was the· privilege of the writer, aided by the Carnegie Institution of Washington, to accompany the third Allan Hancock Expedition to the Galapagos Islands. A preliminary note concerning the trematode parasites collected has been published (Manter, 1934a). Several papers dealing with various helminths collected have appeared (Manter, 1937; Meserve, 1938; Cuckier, 1938; Gilbert, 1938 ; Van Cleave, in press). The present paper deals with the digenetic trematodes collected from fishes. Five hundred and thirtytwo fishes, including nearly one hundred different species, were examined. Approximately 80 per cent of the species and 43 per cent of the individuals harbored some kind of trematode. Meserve (1938) records 22 species of Monogenea. Eighty-two species of Digenea from 80 different hosts are recorded in this paper. In a number of instances the fish host was unidentified or tentatively identified. A number of fishes were preserved and sent to the United States National Museum, where identifications were made by E. D. Reid and G. S. Myers, to whom the writer is indebted for such assistance. Fishes thus identified are indicated by an asterisk (*) in the host list (p. 445).