Ey ow 4 
hi 
; y oe 
cliv THE PALEONTOLOGY OF MINNESOTA. 
sterlingensis, 567, 535, 566, 571. Xestoleberis, 632. 
subcarinata, 672, 570, 575. 
subovata, 565. 
truncata, 552, 568. ; 3 Yoldia, 486. : 
umbonata, 568, 565. - Youngia, 632, 647. 
ventricosa, 573, 535, 570, 574. ‘| 
_ Whorls of Gastropoda, 815. 
Worthenia, 952, 949, 961. : 
tabulata, 950. Zygobranchia, 845. 
Zygospira nicolleti, 615. 
uphami, 498. 
