PLATE IV. 



Pleistocene Hippopotamus. 

 Hippopotamus amphibius. 



Mandible and Upper Premolars and Molars. 



Fig. 



1. Palatal view of mandible (Barrington, 1888). (One-quarter natural size.) 



2. Oblique view of end of mandible. (One-fifth natural size.) 



3. Palatal view of fragment of upper jaw. (One-third natural size.) 



All are from the river gravel of Barrington, near Cambridge, and are preserved 

 in the Sedgwick Museum. From the relatively slight development of the canines 

 and first incisors, it may probably be concluded that the mandible (fig. 1) is that 

 of a female. 



