ee E TA PA SEEE 
; 
AMERICAN NATURALIST. 
AN ILLUSTRATED MAGAZINE 
NATURAL HISTORY. ~ 
EDITED BY 
ALPHEUS 5. PACKARD ann EDWARD D. COPE. 
ASSOCIATE EDITORS: 
W. N. LOCKINGTON, DEP. OF GEOGRAPHY AND TRAVELS. 
W. S. BAYLEY, Dep; MINERALOGY AND PETROGRAPHY. ie 
ProF. C. E. BESSEY, DEPARTMENT OF Bora ANY. a 
J. S. KINGSLEY, INVERTEBRATA. oF 
JOHN A. RYDER, DEPARTMENT OF EMBRYOLOGY. of ae 
Pror. HENRY SEWALL, DEPARTMENT OF PHYSIOLOGY. oe 
ProF. OTIS T. MASON, DEPARTMENT OF ANTHROPOLOGY. 
Dr. C. O. WHITMAN, DEPARTMENT oF MICROSCOPY. 
VOLUME XxX. 
ne <A SOR = ee 
Ec EIVe CN 
parapet yada JUN 1'Ò 1928 
