DINOCERATA. 

 Humerus of Dinoceras :\iikakile, Marsli 



One-fourth Natural Size. „ 



1 age. 



Fig. 1. — Lt'it Iluinerus ; auteriur view, _ . , 



Ui — Distal end. 



Fui. 2. — Tile same; inner view,. 



89 



Fig. 3. — The same ; posterior view, 



3a — Proximal end. 



