STATE OF ILLINOIS 

 DEPARTMENT OF REGISTRATION AND EDUCATION 



DIVISION OF THE 

 STATE GEOLOGICAL SURVEY 



M. M. LEIGHTON. Chief 

 REPORT OF INVESTIGATIONS-NO. 21 



A GROUP OF LARVIFORM CRINOIDS FROM LOWER 



PENNSYLVANIAN STRATA OF THE EASTERN 



INTERIOR BASIN 



BY 

 J. MARVIN WELLER 



PRINTED BY AUTHORITY OF THE STATE OF ILLINOIS 



URBANA. ILLINOIS 

 1930 



