STATE OF ILLINOIS 

 DEPARTMENT OF REGISTRATION AND EDUCATION 



DIVISION OF THE 



STATE GEOLOGICAL SURVEY 



M. M. LEIGHTON. Chief 

 REPORT OF INVESTIGATIONS— NO. 18 



THE GASTROPOD GENUS YVANIA 



Contribution to the Paleontology of Illinois 



BY 



J. MARVIN SELLER 





PRINTED BY AUTHORITY OF THE STATE OF ILLINOIS 



URBANA. ILLINOIS 

 1929 



