EXCHANGE LIST. 101 
Colorado College (Colorado Springs) 
University (Boulder) 
Connecticut Academy of Arts and Sciences (Yale University Publications) 
Denison Scientific Association, Ohio 
Essex Institute, Salem (Mass.) 
Illinois, University of, (Urbana) 
Indiana Academy of Science 
Michigan Academy of Science 
Missouri Botanical Gardens 
Missouri, St. Louis, Academy of Science 
New Mexico, University of, (Albuquerque) 
North Carolina (Chaple Hill) Elisha Mitchell Scientific Society 
Ohio State University (Columbus) 
Oklahoma State University 
Philadelphia Academy of Natural Sciences 
Philadelphia Wagner Free Institute of Sciences 
Smithsonian Institution, Washington 
Tufts' College (Mass.) 
United States Geological Survey of the Territories, Washington 
Natural Museum, Washington 
URUGUAY. 
Montevideo, Museo Nacional de 
January, 1918. 
ARTHUR B. PROWSE, M.D., 
Hon. Librarian. 
