88 THE MENDEL JOURNAL 



D D for brownness or bayness. " Top Hane " was 

 so served by " St. Simon," and produced a filly 

 foal called " Tsii Shima," which was born a grey, 

 and is so entered in the Stud Book. But she 

 changed at the first moult and became a brown, 

 and has so remained. It will be interesting to note 

 next the colour of " Top Hane's " other offspring, 

 when crossed with other DD browns or bays. As 

 taken from the Stud Book, they are as follows : — 



In 1904, a grey filly, " Banzai," by " St. Frusquin," 



a D R brown. 

 In 1905, a grey or brown filly "Tsu Shima," by 



"St. Simon," a D D bay. 

 In 1906, a grey filly "Topaz," by "St. Frusquin," 



a D R brown. 

 In 1907 and 1908, barren. 

 In 1909, a grey or brown colt by " Misselthrush," 



a D D brown. 



The colt of 1909, by " Misselthrush," which is 

 entered as a grey or brown, is evidently like " Tsu 

 Shima." Both were born grey, but turned brown 

 at the first moult. 



We have thus good reason to regard the two 

 grey horses, " Pontoon " and '*Top Hane," as what 

 we may for the moment call impure greys. They 

 are externally grey, but we are led to regard them 

 as carrjang, in addition to greyness, some recessive 

 colour such as brownness or bayness. 



In connection with grey horses the next question 

 which we naturally ask is : "Do pure greys exist?" 

 By this I mean are there grey horses which transmit 



