PLATE XVI. 
Fig. I. — Hippopotamus ponderosiis, sp. nov. Right 3rd lower molar, outer side, nat. 
size. 
lA. — Hippopotamus pondcrosus, sp. nov. The same tooth, crown-view. 
2. — Hippopotamus pondevosus. Right ist lower premolar, outer side, nat. size. 
3. — Hippopotajiius poiiderosus. Right 2nd lower premolar, outer side, nat. size. 
4. — Bubalus andersoni, sp. nov. Right lower jaw, external side ; ^ nat. size. 
4A. — Bubalus andersoni, sp. nov. The same, crown-view ; about f nat. size. 
