PLATE IV. 



Pleistocene Bears (U. arctos). 



Cranium and Mandible. 



(Two fifths natural size.) 



Fig. 



1. Dorsal view of the cranium. 



2. The skull seen from the left side. 



3. Ventral view of the cranium. 



This specimen was found in the peat of Burwell fen, and is preserved in 

 the Sedgwick Museum, Cambridge. 



Lettering as in Plate III, with the addition of — 



j. Condyloid foramen. 



/.-. End of sagittal crest. 

 /. Foramen lacerum posterius. 



m. Carotid foramen. 



n. External auditory meatus. 



o. Eustachian canal. 



}>. Posterior aperture of alisphenoid canal. 



(/. Paroccipital process of exoccipital. 



r. Angle of mandible. 



