AMERICAN 
NATURALIS 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
IN THEIR WIDEST SENSE. 
MANAGING EDITORS: 
Prors, E. D. COPE ann J. S, KINGSLEY. 
ASSOCIATE EDITORS: 
Dr. C. O. WHITMAN, Dr. C. E. BESSEY, THOMAS WILSON, 
Pror. C. M. WEED, Pror. W. S. BAYLEY, Pror. E. A. AN DREWS. 
AUGUST, 1892. 
CONFENIS. 
PA 
THE MOCKING BIRDS LEFT NEW JERSEY—A 
GEOLOGICAL REASON. 
; Samuel EEE Ph. D. 635 
AND THE GERM-CELLS. (Continued.) 
“ (llustrated AY o. eny cca fama 642 
HEAD OF AN EMBRYO AMPHIUMA. 
J S Ku ly 671 
ANCE OF THE SCIENCE AND OF THE DEPAR 
E OF PREHISTORIC ANTHROPOLOGY. 
Thomas Wilson. 681 
krpa —An American Book on 
the Oak Tree—The Horse, 
y in AR sees leas Fur of 
squarrosa. pameran 
Zoolo, otes on a 
Chipping Sparrow. ( (Illustrat 
Embryolo, The 
. 
SCIENTIFIC Hi 
