cliv 



THE PALEONTOLOGY OF MINNESOTA. 



sterlingensis, 5O7, 535, 566, 571. 



subcarinata, 572, 570, 575. 



subovata, 565. 



truncata, 552, 568. 



umbonata, 568, 565. 



ventricosa, 573, 535, 570, 574. 

 Whorls of Gastropoda, 815. 

 Worthenia, 952, 949, 961. 



tabulata, 950. 



Xestoleberis, 632. 



Yoldla, 486. 

 Youngia, 632, 647. 



Zygobranchia, 845. 

 Zygospira nicolleti. 615. 

 uphami, 498. 



