288 



OBSERVATIONS ON CRANIA 



Eskimo, the Algonquins of Canada, the Moundbuilders of the Cumber- 

 land Valley, and the Peruvians from the coast adhere to their respective 

 and widely differing types is decisive upon this point; for while it is unde- 

 niably true that in a collection composed exclusively of either kind of these 

 crania there will usually be found a percentage, be it great or small, of 

 skulls that differ from the "typical" form, yet it is equally true that, after 

 making all due allowance for the range of individual variation, the one 

 form will be found to be so overwhelmingly predominant that the presence 

 of any other at once suggests an intruder or gives good reason for doubt- 

 ing its authenticity. 



Upon this point it is probable that a study of the present collection 

 may throw some light; at all events a comparison of the series from the 

 different islands with each other will show how sharply marked are these 

 differences, and within what narrow geographical limits they sometimes 

 occur. Taking the collections from the islands, and those from Santa 

 Barbara and San Luis Obispo Bay — stations on the mainland — as a whole, 

 and it will be found to be, as stated above, decidedly orthocephalic; but 

 if the specimens be divided according to the cephalic index there will result 

 fifty -five dolichocepbali, two hundred and nineteen orthocephali, and one 

 hundred and twenty -four brachycephali, as in the following table: 



TABLE IV. 



Locality. 



Santa Cruz 



Santa Catalina 



San Clemente 



Santa Cruz 



San Miguel 



San Nicolas 



Santa Barbara, mainland 

 San Luis Obispo Bay 



Examined with reference to the individual variation, and it will be 

 found that the cephalic index ranges from .654, Peabody Museum, No. 



