SECRETARY’S REPORT 79 
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 office 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 Reservoir 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 Reservoir 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 
I. Fraser 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 
