598 



THE AMERICAN NATURALIST TVol. XLVII 



Pedigree Table XI— Continuation of VII 





( • Albert Tell 



\:~ 



III 



1 

 1 



I • Ethel 



( XWm. Tell 



[ X Lucerne (Imp.) 







[ Daffodil 



f XWm. Tell 

 | X Zurich (Imp.) 

 f • Robert Tell 

 1 • Estelle 



x = 



{ XBrmlie ^Imp.f ) 

 / XWm. Tell (Imp.) 

 \ XLissa (Imp.) 



G< No. | 7 | 8 9 





Pedigree Table XII— Continuation of VII 



Pedigree Table XIII— Continuation of VII 



Hester 



| Henry Clark Tell 



f • Wm. Tell 











| • Wm. Tell 







Gen. No. 









must be considered to be unrelated until the contrary is 

 proven by the evidence of their ancestry. After all, the 

 only thing we can possibly measure is the inbreeding 

 shown in the recorded pedigree. All that has happened 

 prior to the beginning of the record must be a matter of 

 assumption. The same assumption should, however, be 

 made for all cases. What this assumption really means 

 practically is that, in all cases of analysis of actual pedi- 

 grees, which are bound after a time to come to an end, the 

 values of the coefficients of inbreeding obtained are lower 

 limiting values. They signify that the intensity of in- 

 breeding in a particular case could not have been less 



