No. 573] 



STUDIES ON INBREEDING 



517 



sire. The next entry in Table III indicates that in the 

 fourth and higher ancestral genernt ions at least 5/8 of 

 all the dam's ancestors were the same individual animals 

 as were also ancestors of the sire. One half of them were 

 the same before the reappearance of St. Lambert's Rioter 

 King. He makes up the additional 1/8 of the dam's 

 ancestry. 



From these tables it is obvious that a very considerable 

 portion of the inbreeding shown in the pedigree of King 

 Melia Rioter 14th arises from the fact that his sire and 

 dam were closely related. Furthermore, both sire and 

 dam are closely inbred in their own lines. The curve of 

 total inbreeding in this case is shown in Fig. 1, along with 

 the curves for continued brother X sister, parent by off- 

 spring, and cousin X cousin mating. 



