G. F. Eaton — Remains of Man and Lower Animals. 333 



If the material collected at Cuzco dates from a time preced- 

 ing the Spanish Conquest, it would of course appear that the 

 bovine bones included in the collection pertain to some species 

 of Bison, for no other feral group of the Bovidse need be con- 

 sidered. Such a conclusion, while by no means untenable 

 on general grounds, might not be readily accepted by zoologists 

 familiar with the principles concerned in the distribution of 

 animals ; for, although it is recorded that the Spaniards found 

 captive Bison at Montezuma's capital, the American Bison in 

 the free state is not known to have ranged further south than 

 the northeastern provinces of Mexico. 



13, 14, 15, and 16. These more or less fragmentary bones 

 are confidently referred to Lama guanacus, the Guanaco, the 

 feral species from which the domestic breeds of Llama and 

 Alpaca are supposed to be derived. 



No attempt has been made in this report to render any 

 account of the chemical composition of the material described, 

 as the conditions governing the destruction of osseous tissue, 

 its mineral replacement, etc., are so varied and uncertain that 

 chemical changes in the broader sense are no longer regarded 

 by the highest authorities as reliable criteria of age. 



Yale University Museum, March 15, 1912. 



