312 UNIVERSITY OF COLORADO STUDIES 



to a new species of Mylodon, but before it can be satisfactorily described 

 as such it will be necessary to reconsider the whole subject of the Mylo- 

 dontinae, as represented in the North American Pleistocene. 



The Walsenburg locality is on the dividing-line between the Pierre 

 and Trinidad formations, but it is evident that there must be a residual 

 patch of Pleistocene deposit. Whether other bones can be found there, 

 and especially whether the Colorado animal can be proved contem- 

 poraneous with man, must for the present remain unknown. The 

 discovery is, to say the least, suggestive of most interesting possibilities. 



