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It is not the purpose of the writer to provide a complete synonomy for the species listed in the systematic discussion which follows. Rather, the synonomy is complete for described species of West Coast Tertiary and is fairly representative of most of the American Tertiary foraminiferal literature. Identification of specimens was accomplished when possible by comparison with primary or secondary types or topotypical material. Types were consulted at the following repositories of type material: University of California Museum of Paleontology, Berkeley, California; Stanford University; California Academy of Sciences, San Francisco; University of Texas, Austin; Louisiana State University, Baton Rouge; United States National Museum, Washington, D.C.; Rutgers University, New Brunswick, New Jersey; Columbia University, New York City; Paleontological Research Institute and Cornell University, Ithaca, New York; Walker Museum, Chicago; Indiana University, Bloomington; University of Washington, Department of Geology, Seattle; University of Oregon, Eugene.

Holotype, paratype, and hypotype specimens listed in the pages to follow have been deposited in the Micropaleontology Museum, Department of Paleontology, University of California, Berkeley. In addition, paratypes and hypotypes of the species are on deposit in the Museum of Paleontology, Department of Geology, University of Washington, Seattle. Many paratypes of species have been deposited in the collections of the United States National Museum, Washington, D.C.

The systematic arrangement of the family grouping largely follows that of Cushman (1940b), but has been slightly modified following Glaessner (1947) and the author’s own convictions regarding the relationships of certain groups. The “Heterohelicidae” have mostly been included with the Buliminidae, as

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