NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
3 
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 faunal 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. Quisenberry, 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 due 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 
