PLATE I. 



Pleistocene Hippopotamus. 



Hippopotamus amph ibius. 



Cranium. 



(One-fourth natural size.) 



Fig. 



1. Dorsal ) view of a cranium from the river gravel of Barriugton, near Cam- 



2. Ventral 5 bridge. 



This is the cranium of the composite skeleton set up in the Sedgwick Museum, 

 Cambridge. The premaxillce are missing. 

 <t. Occipital condyle. 



b. Par-occipital process of exoccipital. 



c. Tympanic. 

 (1. Orbit. 



e. Nasal. 



/. Lachrymal. 



g. Jugal. 



//. Glenoid fossa. 



