INTRODUCTION 3 



of the Department of Fish and Game Management, Oregon State University. 

 has also aided in the preparation of the fish host list. Amphibian and reptilian 

 names are from Schmidt (1953). Bird names are from the American Orni- 

 thological Union Checklist (1959). Mammalian names are from Hall and 

 Kelson (1959). Marine moUuscan names have come from Abbott (1954). 

 Fresh water molluscs in general follow the names of Ward and Whipple 

 (1959) and Henderson (1929). Other invertebrate names are after Smith 

 etal. (1954) and Ward and Whipple (1959). 



The bibliography is alphabetically arranged and includes all papers cited 

 in the catalog as well as a few additional papers from the Pacific Northwest 

 which deal with treatment, diagnosis, or other aspects of trematode parasitism, 

 but do not add new host or distribution records. 



Unpublished theses and dissertations include many new distributional 

 and host records. Many of these will subsequently be published, but others 

 will not. To prevent a complete loss of these unpublished records, we are 

 appending a list of them at the end of our bibliography. 



The index is an attempt to list all scientific and common names that 

 appear in the text of the paper. 



A number of new host and distributional records are included and are 

 indicated by an asterisk (*) instead of a bibliographic reference — followed 

 by the county or counties where found. No attempt has been made to analyze 

 the fauna critically or to make new synonymies. This catalog is a noncritical 

 compilation of the published information that is available. Neither descrip- 

 tions nor figures are included. 



The investigation was supported by a research grant, E 867, from the 

 National Institute of Allergy'- and Infectious Diseases of the National Insti- 

 tutes of Health, United States Public Health Service. 



