G. F. Eaton — Remains of Man and Lower Animals. 325 



evidence be found (and only excavation appears to be capable 

 of finding it), we shall have to conclude that the lowest terrace 

 was still aggrading at the time of the Spanish Conquest and 

 that after the aggradation cycle had been completed, degrada- 

 tion followed, the valley being worn down to a depth of about 

 thirty feet. 



The bovine cannon bone and rib of the Cnzco collection 

 resemble bison more than they do modern domesticated cattle. 

 But apart from the present find there is no evidence that the 

 bison existed in South America, and while it is possible that its 

 remains may yet be found, it is very suggestive that none have 

 been reported until now. It is, of course, necessary always to 

 find the first occurrence. Nevertheless, there is a basis for 

 doubt in the fact that the species has escaped discovery until 

 now. Further excavation is needed, for the same body of 

 gravels may yield material that will put the conclusions upon 

 a more solid foundation. If later studies should yield evi- 

 dence in favor of the conclusion that the material belongs 

 to the Spanish period, we shall have still the fact of inter- 

 stratification as a starting point, and the conclusions based upon 

 that fact will have almost equal interest with the conclusions 

 here stated, as to the glacial age of the material. Changes of 

 such magnitude indicate a swing of the climatic pendulum 

 but little short of remarkable. 



Art. XXYIII. — Report on the Remains of Man and of 

 Lower Animals from the Vicinity 'of Cuzco, Peru; by 

 George F. Eaton. 



The vertebrate remains described in this report were dis- 

 covered in the vicinity of Cuzco, Peru, by Professor Hiram 

 Bingham, Director of the Yale Peruvian Expedition of 1911. 

 To him I am indebted for the privilege of studying this inter- 

 esting and valuable collection. 



Under the List of Genera and Species are enumerated the 

 specimens that are sufficiently characteristic for identification. 

 Each bone is numbered in this List, so that by turning to the 

 corresponding numbers in the following Description of Mate- 

 rial, further information regarding the more important speci- 

 mens may be found. 



