9 
AMERICAN NATURALIST 
AN ILLUSTRATED MAGAZINE 
NATURAL HISTORY: 
EDITED BY 
A. S. PACKARD, Jr, anD EDWARD D. COPE. 
ASSOCIATE EDITORS: 
W. N. LOCKINGTON, DEP. OF GEOGRAPHY AND TRAVELS. 
ProF. H. CARVILL LEWIS, DEPARTMENT OF MINERALOGY, 
Pror. C. E. BESSEY, DEPARTMENT OF BOTANY. 
Pror, C. V. RILEY, DEPARTMENT OF ENTOMOLOGY. 
ProF. O. T. MASON, DEPARTMENT OF ANTHROPOLOGY. 
Pror. HENRY SEWALL, DEPARTMENT OF PHYSIOLOGY. 
Dr, C. O. WHITMAN, DEPARTMENT OF MICROSCOPY. 
a VOLUME XVII. 
PART FIRST, 
eat Sion Y, 
( “ger 8 1929 
