ON THE ?;OIlTII-WESTEnN TRIBES OF CANADA. 



441 



Length of arm of Males. 



Northern tribes and Vancouver Island . 



Bilqula 



Fraser River 



Harrison Lake 



Washington 



Columbians 



Northern Oregon 



Oregoniau Tinneh 



Crosses between Oregonian Tinneh aud Califor- 



nians 

 Northern Californians 



Length of arm of Females. 



Bilqula 



Harrison Lake . 

 Washington 

 Northern Oregon 

 Oregoniau Tiuneh 



We will direct our attention to the mazimum of frequency in each of 

 these series. It will then appear that in several of the groups two 

 maxima occur, or are, at least, indicated. The principal maximum in 

 each series is indicated by bold type. 



This table gives a clue to the understanding of the types of the 



