THESE STUDIES IN NATURAL HISTORY 
ARE DEDICATED ‘TO 
THE VENERATED MEMORY 
OF MY FATHER, 
JOHN McCOOK, M. D., 
A LOVER oF ‘NATURE, A FRIEND OF SCIENCE, 
Je a A Goop PHYSICIAN, ‘A SERVANT OF 
44 a \ _— «HIS FELLOW MEN 
‘ | WHOSE FAITH IN THE UNSEEN 
NEVER FALTERED. 
