174 



GEOLOGY. 



Fig. 408. — A Group of Fossil Leaves of Typical Cretaceous Plants from the 

 Dakota Horizon: a, Liriodendron giganteum Lesq.; b, Myrica longa Heer; c. 

 Magnolia pseud o-acuminata Lesq.; d, Sterculia mucronata Lesq.; e, Quercus sus- 

 pecta Lesq.; /, Viburnum incequilaterale Lesq.; g, Betulites westi, var. subinte- 

 grifolius Lesq.; h, Sassafras subintegrifolium Lesq.; i } Ficus inoequalis Lesq. 



