PROC^EDIINQS OF THE CALIFORNIA ACADEMY OF SCIENCES' Fourth Series Vol. XIII, No. 10, pp. 151-186. March 18, 1924 <iUn0y RECTIFICATIONS OF NOMENCLATURE BY G. DALLAS HANNA Curator, Department of Iitvertebrate Paleontology During the winter of 1922-1923 Mr. Frank iM. Ander-son and the writer spent much time and labor in an en-deavor to monograph the fauna of the Eocene at the type locality of the Tejon group in Kern County, California. In the course of the work several names of West American fossils were found to be preoccupied in geological literature and require replacing to accord with the rules of the Inter-national Commission of Zoological Nomenclature. To bring these to the notice of Avorkers it was thought best to incor-porate them in a separate paper, thinking they would be less likely to be overlooked than if they were scattered in publi-cations dealing with various particular problems. Before making a record of the few names thus found it was thought advisable to spend a short time in an examination of literature for the purpose of ascertaining if any other such instances needed attention. Accordingly, several days were spent in the libraries of the California Academy of Sciences and the University of California with the results set forth below.
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