Bailey — Two New Subspecies of North American Beavers. 193 



with upright occipital crest, giving a "sawed off" appearance to base 

 of skull. 



Measurements. — Type, 9 ad., total length, 1170; tail vertebrae, 470; 

 hind foot, 185 millimeters. Skull of type, condylobasal length, 129; 

 zygomatic width, 96.4; length of nasals, 4(>; width of nasals, 24; mas- 

 toid breadth, 66; height of occiput, :>9 (would be 41 but for unusual 

 notch in basio-occipital ) ; alveolar length of upper molar series, 29.4. 



Weight of type, 58 lbs. 



