NORTH AMERICAN EARLY TERTIARY BRYOZOA. 



Eastern and Southern States where Tertiary strata outcrop, and to the Federal 

 geologists who have encouraged their studies. To Dr. George Otis Smith, Director 

 of the United States Geological Survey, and to Mr. David White, Chief Geologist, 

 obligations are due for their kind interest in the work and for the help of the 

 Survey in the preparation of the work. Especial recognition is due Dr. T. 

 Wayland Vaughan, Chief of Coastal Plain Investigations of the Federal Survey. 

 It was at his urgest request that the study of the American Tertiary bryozoa was 

 undertaken; he has spared no efforts to help the work along, not only by his own 

 personal exertions in supplying both stratigraphic and paleontologic data, but 

 also in having his assistants collect and prepare many lots of fossils for this 

 special study; and his advice and broad experience in all matters relating to the 

 American Tertiary formations have been of inestimable value. 



Dr. C. Wythe Cooke, of the United States Geological Survey, has supplied 

 many splendid faunas resulting from his stratigraphic work in Alabama and 

 Georgia particularly. He is the discoverer of the celebrated Vicksburgian locality 

 near Monroeville, Alabama, and it is due to his intelligence and care in collecting 

 fossils and recording stratigraphic data that it has been possible to work out 

 many of the bryozoan fauna! zones of the American early Tertiary. Thanks are 

 due. to Mr. Wendell C. Mansfield, of the United States Geological Survey, for 

 collections, and to Mr. I. B. Milner. of the same organization, for his care in the 

 preparation and preservation of these hitherto neglected fossils. 



Dr. Charles D. Walcott, Secretary of the Smithsonian Institution, and Dr. 

 Richard Rathbun, late Assistant Secretary in charge of the United States National 

 Museum, extended various courtesies during the course of this work and fur- 

 nished financial assistance for making special investigations and for the publication 

 of the work. Under these auspices the junior author was enabled to make researches, 

 particularly in North and South Carolina, and to collect the very large middle 

 Jacksonian faunas here described. 



Dr. Charles E. Resser and Miss Adelaide C. Quisenberrj 7 . of the division of 

 paleontology of the United States National Museum, have been of great aid to the 

 junior author throughout the work. Doctor Resser has assisted materially in the 

 preparation of numerous text figures, and Miss Quisenberry has taken a most active 

 interest in the translation and preparation of the manuscript. The retouching of 

 the photographs and the preparation of the drawings have been done by Miss 

 Francesca Wieser. of the United States Geological Survey, whose skill and faithful 

 work is herein again attested. 



Mr. Earle Sloan, of Charleston. South Carolina, was most kind in furnishing 

 numerous specimens and in personally conducting the junior author during a trip 

 through the Southern States to classic localities, which, without his detailed knowl- 

 edge of the country, could not have been found. The splendid faunas from Baldock, 

 Eutaw Springs, and Lenuds Ferry, South Carolina, are clue to Mr. Sloan's gen- 

 erosity and interest in the work. Dr. S. W. McCallie, State geologist of Georgia, 

 has also furnished collections which have been of value in studying the Tertiary 



