THE BALT 
AMERICAN NATURALIST, 
9 LEE. 
AN ILLUSTRATED MAGAZINE 
NATURAL HISTOR. 
EDITED BY 
A. S, PACKARD, Jr, anp EDWARD D. COPE. 
ASSOCIATE EDITORS: 
 Pror. C. E. BESSEY, DEPARTMENT OF Bray. 
Pror. C. V. RILEY, DEPARTMENT OF OLC 
Dr. R. H, WARD, DEPARTMENT OF Micr 
VOLUME XV 
PHI rae S 
