HEREDITY OF RACEHORSE STAMINA 59 



altogether show that is the case, and doubtless some 

 further factor is concerned. 



Do Stallions Transmit the Female Inhibitory 



Factor ? 



The interesting question now arises, do mares 

 transmit the inhibitory factor to their sons, and do 

 the gametes of the staying and intermediate stallions 

 pass it on to some of their daughters ? 



In Table III. it will be noted that the daughters of 

 some horses, in regard to stamina, fall far below the 

 standard of the same stallion's sons. Martagon is a 

 marked case. Count Schomberg, Marco, Collar, and 

 Wolfs Crag are others. The dams of these horses 

 were all non-stayers. An analysis of the produce 

 of these mares may help to a solution : — 



TABLE VI. 



Offspring of the Dams of the Five 

 Stallions. 



Total fillies = 21. 



Total colts = 31. 



*To which stallions these five dams were rtspectiveh* mated may be 

 seen in Table III., bj^ looking down the first column for the stallion's name. 



