444 



EEPOET 1891. 



Staii 



It appears from these tables, particularly from that of the cephalic 

 indices, that the individuals south of Rogue River are similar to the 

 Northern Californians. But we also recognise distinctly in the series the 

 secondary maximum belonging to the Oregonian Tinneh. In the same 

 way we see that the tribes north of Rogue River are much more homo- 

 geneous, but recognise a secondary maximum corresponding to the 

 Northern Californians. The table brings out exactly what might be 

 expected : a greater admixture of Californian blood in the south than in 

 the north. It is also important to note that the crosses in all these 

 cases appear more variable than the individual races. This is what 

 must take place if the crosses contain both the component types, 

 and are not aiTanged around a middle type. The measurements, 

 in the two groupings discussed above, give the following ranges of 

 variation : — 



If the crosses and the component groups were equally variable, we 

 ought to expect much narrower limits of variation among the former, as 

 they embrace only a few individuals ; while actually their ranges of 

 variation equal or exceed those of the purer tribes. 



I believe all these points, taken in connection with the results of Dr. 

 von Luschan and O. Ammon, prove beyond a doubt the fact that in a 

 mixture of tribes the component types remain unaltered. 



The tables of finger-reach, height (sitting), length of arm, do not bring 

 out these relations, because their ranges are almost the same among all 

 the tribes, and therefore intermixture cannot be detected in the com- 

 pound tribe. 



We will try to explain the observations based on these considerations. 

 Among the Bilqula, in Washington, and throughout Oregon, we find a 

 type present of a stature, ranging from 166 to 172 cm., with a cephalic 

 index of from 84 to 87, and a facial index of from 83 to 86. Among the 

 Bilqula, and in Oregon, this is the prevailing type, while in Washington 



