MAY, 
Volume XV. 1915 Number 7. 
THE 
OHIO NATURALIST 
AND 
JOURNAL OF SCIENCE 
Official Organ of the OHIO AGADEMY OF SCIENCE and 
BIOLOGICAL CLUB of the OHIO STATE UNIVERSITY 
9 
COLUMBUS, OHIO 
Annual Subscription Price, $1.00 Single Number, 15 Cents 
Entered at the Post-Offiloe at Columims, Ohio, as Second-Class Matter. 
