488 0. C. Marsh—New Tertiary Mammals. 
Measurements. 
Length of symphysi _ 199° mm 
Depth of jaw below first peemnintsc.6 22 id st ise 
Depth Below leat lower molt 19s 05 sc cn 69° 
Space occupied by lower molar serie 2S, su 
Space oceupied by three lower true molars, pate Prey bree ey 
All the a remains of the present species are from the 
Miocene of Colorado. 
Yale College, May ae 1873. 
