388 



Philip Ainsworth Means, 



ham have led him to accept the above rate as a fair average. 

 According to Gonzalez de la Rosa, antiquities occur in the guano 

 at depths varying from nine feet to forty or more.^^ This means 

 that in 1870 (at which date the investigations were made) the 

 antiquities presumably varied in age from about four centuries 

 (i. e. 9 feet gives a date of about 1450) to about sixteen cen- 

 turies (i. e. 40 feet gives a date roughly equal to 200 A. D.). 

 Perhaps future work will yield more detailed information as to 

 which cultures are found at various depths in the guano. At 

 all events, it seems possible that for want of a better criterion 

 we must bear the evidence of the guano deposits in mind. 



It is now well for us to summarize and tabulate the general 

 results of the evidence brought out by the foregoing discussion. 

 Once again the reader is asked to remember that the dates here 

 offered claim to be no more than roughly approximate guides to 

 the imagination. 



An Approximate Chronology of the Early Cultures 

 OF Peru.^^ 



Coast Regions Dates 



Primary 



Migrations and ? -200 A. D. 



Proto-Chimu and 

 Froto-Nasca 



Mountain Regions 

 Primary Migrations 

 Tiahuanaco I 



Tiahuanaco II 



Coast Tiahuanaco 

 n, followed by 

 "Epigonal" and 

 red-white-black 



2CX)-900 



wares 



" Gonzalez de la Rosa, 1908. 



" The reader is particularly reminded that there is much evidence to 

 show that Proto-Chimu, Proto-Nasca and Tiahuanaco I all contributed 



