LEDER 18) OOO NC IOTE IC 
PLACENTICERAS. 
u Page 
Hires 1s sPlacenticenasmiencalamee Nice kes ae ee ee Sepia MSE es Sete 207 
Suture of specimen from near Harper, Wyo. (SeePl. XX XVII.) 
Montana group, Upper Cretaceous. 
EGS) LACE UIGERMs unten COLO nV AMes |COSHCULUNT OM Kalay/ UU Ue et terete ean et 207 
Side view of type of variety, my collection, purchased from Ward. Probably from 
Black Hills, 8. Dak. 
Montana group, Upper Cretaceous. 
328 
