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THE AMERICAN NATURALIST [Vol. LIV 



Z T =90.63 

 Z s = 92.11 

 Z 9 =93.65 

 Ztt = 93.85 

 Total 661.53 



values of the series of the coefficients of inbreeding and relation- 

 ship for each generation. 



The calculations of the total coefficients are now the following : 



Or expressed verbally : In eleven generations King Melia Rioter 

 Fourteenth is 73.50 per cent, inbred, his sire and dam are 79.14 



