A Remarkable Ground Sloth 



Surface. 



Fig. 2. Rough vertical section of sloth pit. 



The direction changes somewhat from top to bottom to allow for the tortuous course 



of the old pipe. At the top the section cuts from east to west and represents 



what the observer would see looking south ; at the bottom the observer 



is assumed to be facing southeast. Dimensions given are estimated. 



After Longwell. 



GEOLOGICAL AGE 



The sloth, which has been determined as pertaining to the species N othrotherium 

 shastense Sinclair, is undoubtedly Pleistocene, as the species is found in the Rancho 

 la Brea asphalt associated with Mylodon harlani, Elefhas jeffersoni, Camelofs hes- 

 temus, Equus facijlcus, Smilodon calif ornicus, Felis bebbi, Aenocyon dirus, and other 

 forms of mid- Pleistocene age. On the other hand, its amazing condition of preserva- 



