Wilson — Polygamous Mendelian Factors. 



309 



as of some other colour. Consequently we cannot look for the figures being 

 in absolute accordance with expectation. 



At one time there were many greys among English Thoroughbreds, but 

 the great successes of some sires of other colours — among them Eclipse — 

 combined with the belief that grey was not a good colour for speed, reduced 

 the number of greys, and made the mating of grey with grey very exceptional. 

 Thus it has been very difficult to find a sire pure for greyness. In the 

 Thoroughbred Stud Book one only— The Coombe Arabian— has been found 

 with enough foals upon which to form a judgment. A few years ago 

 Mr. Eobert Bunsow discovered an Arabian stallion, " Celle Amurath," the 

 property of the Prussian Government, wliicli was pure for greyness.' This sire 

 got 600 foals from mares of all colours, and every foal was grey. In his 

 researches Dr. Walther found another pure grey horse, Zigeuner, which got 

 thirteen foals from grey mares and forty-six from mares of other colours, 

 and all these foals were grey but one, which died young. 



The following table gives the progeny of a number of grey Thoroughbreds 

 (in vols, i to xxi) and Shires (in vols, i and xxxiii) with mares of all colours. 

 The sires are set down with the date of their birtli where that is known. Tlie 

 last three are Shires. Obvious exceptions are again put within brackets : — 



