SIXTY-SIXTH ANNUAL REPORT 25 



to those of the same age on the Plains, illustrate the principles of 

 geographical variation quite as well as the living species. 



White's laboratory activities for the year fall into two periods. The 

 first, from October 4 to November 5, was spent at the field ofiice at 

 Lincoln, Nebr., preparing supplementary reports on the reservoirs 

 visited and in identifying the osteological material obtained in archeo- 

 logical excavations. Also, during that period the first draft of the 

 technical report on the physiographic studies in the Angostura area 

 was prepared. The remaining time was spent in the division of 

 vertebrate paleontology at the United States National Museum. In 

 addition to the preparation of technical reports on the paleontological 

 material obtained in the reservoir areas, six boxes of osteological 

 material from the Missouri and Columbia Basins were identified. 



White completed two technical reports representing the results of 

 field and laboratory activities. They are: "Preliminary Analysis of 

 the Vertebrate Fossil Fauna of the Boysen Keservoir Area," and 

 "Endocrine Glands and Evolution No. 2: The Appearance of Large 

 Amounts of Cement on the Teeth of Horses." Both were submitted 

 for publication. At the close of the year he had virtually finished 

 two other papers: "A Preliminary Appraisal of the Physiographic 

 History of Horsehead Creek in the Vicinity of 39FA65" (with Jack T 

 Hughes), and "Analysis of the Vertebrate Fossil Fauna of the* 

 Canyon Ferry Keservoir Area." 



Throughout the field season White enjoyed congenial relationships 

 with members of other Government agencies and with members of 

 educational institutions. Among those from whom material assistance 

 was received are: Harry A. Tourtelot of the United States Geological 

 Survey, J. LeRoy Kay of the Carnegie Museum, Mr. McQuiren, 

 geologist for the Bureau of Reclamation at the Boysen project, and 

 Roy Austin, Superintendent of Public Schools at Townsend, Mont. 

 Also the work was materially expedited by the many forest rangers 

 who placed the facilities of their stations at the convenience of the 

 party. 



As in previous years, a number of student assistants were employed 

 as members of the various field parties. Robert L. Hall and Warren 

 L. Wittry were with the Cooper party from July 1 to September 4 

 and August 14, respectively. Gordon F. McKenzie joined the same 

 party on August 1 and remained with it until September 4. John C. 

 Donohoe was with the White party July 1 to 31, while Ernest L. 

 Lundelius, Jr., accompanied it from July 1 to September 4. Dorothy 

 E. Eraser was with the Cooper party during the month of August in 

 the capacity of a special consultant. Neil J. Isto joined the Wheeler 

 party on June 2 and was in the field at the close of the year. 



Oklahoma. — Work in Oklahoma consisted of both surveys and 



