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THE MENDEL JOURNAL 



namely, the mixed sample which never ran, the 

 mares are made up principally of sprinters, PP, and 

 sex limited intermediates, PRI, together with a small 

 percentage of slow intermediates and slow stayers. 

 It is not possible to give any approximate expectation 

 from such a mixed and undetermined parentage. 

 The actual result, as will be seen, is 75 : 97 : 65, which 

 stands out clearly from the ratio of 9 : 104 : 114, 

 which we have seen is the result of crossing the 

 seventeen RR stallions with mares very similar to 

 those mated to the PR sires. 



Turning now to the ten sprinting sires at the 

 bottom of Table IIL, we have a striking contrast 

 to the first seventeen staying sires in the same table, 

 and already considered. The offspring of these ten 

 horses is made up of :— 



Sprinters. 

 118 



Intermediates. 

 50 



Stayers. 

 5 



The following table illustrates the actual matings : 



