STATE OF ILLINOIS 

 Henry Horner, Governor 



DEPARTMENT OF REGISTRATION AND EDUCATION 

 John J. Hallihan, Director 



Fieldbook of 

 Illinois Land Snails 



By 

 Frank Collins Baker 



Printed by Authority of the State of Illinois 



NATURAL HISTORY SURVEY DIVISION 



Theodore H. Frisox, Chief 



MANUAL 2 

 ^'rbana August 1939 



