STATE OF ILLINOIS 
DEPARTMENT OF REGISTRATION AND EDUCATION 
DIVISION OF THE 
NATURAL HISTORY SURVEY 
STEPHEN A. FORBES, Chief 
Vol. XIV. BULLETIN Article II. 
DISTRIBUTION OF THE FRESH-WATER 
SPONGES OF NORTH AMERICA 
BY 
FRANK SMITH 
PRINTED BY AUTHORITY OF THE STATE OF ILLINOIS 
URBANA, ILLINOIS 
June, 1921 
