ay JA] 
A CLF / 
Daa Yow 
AS S G 
AMERICAN NATURALIST. 
AN ILLUSTRATED MAGAZINE 
NATURAL HISTORY. 
EDITED BY 
EDWARD D. COPE anp J. S. KINGSLEY. 
ASSOCIATE EDITORS: 
W. N. LOCKINGTON, DEPARTMENT OF GEOGRAPHY AND TRAVELS. 
W. S. BAYLEY, DEPARTMENT OF MINERALOGY AND PETROGRAPHY,. 
CHARLES E. BESSEY, DEPARTMENT OF BOTANY. 
J. H. COMSTOCK, DEPARTMENT OF ENTOMOLOGY. 
W. T. SEDGWICK, DEPARTMENT OF PHYSIOLOGY. 
JOHN A. RYDER, DEPARTMENT OF EMBRYOLOGY. 
THOMAS WILSON, DEPARTMENT OF ANTHROPOLOGY. 
. C. O. WHITMAN, DEPARTMENT OF MICROSCOPY. 
VOLUME XXII. 
PHILADELPHIA : 
LEONARD SCOTT PUBLICATION CO. 
ee 1888. 
