ON HEREDITY IN BABBITS. 



Table 27. 



313 



Hybrid Self and Marked X Marked (F^). 



Matinr/s. Self. Marked, Butch. 



S 7 X M 10 1 ( 1 



S7xM]0 2 1 



S 7 X M 10 2 1 4 



M 8 X M 10 4 4 



M 8 X M 10 2 4 2 



M 8 X M 10 1 1 



M 9 X M 10 2 6 



M 9 X M 10 1 4 



M 9 X M 10 4 2 



M 9 X M 10 . . . , 2 4 1 



M 9 X M 10 1 4 1 



M 9 X M 10 2 1 1 



Total 16 34 17 



In the third generation, 3 of the extracted selfs bred together 



and with a pure self produced 15 young, of which 14 were selfs 

 and 1 was slightly marked with white on the tip of the left paw. 

 The matings were as follows : — 



Table 28. 



Extracted Selfs x Selfs (F3). 



Matings. Self. Marked. Dutch. 



ES35XES26 6 



ES36XES26 3 1 



ES36XS47 5 



Total 14 1 



4 of the extracted Dutch bred together have so far given 10 

 youDg, all Dutch-marked. The matings were : — E D 58 x E D 37 

 gave 6 Dutch, and ED 54xED 41 gave 4 Dutch. 3 of the 

 extracted marked individuals bred together and with hybrids 

 gave 17 young, of which 3 were selfs, 12 were marked, and 2 

 were Dutch. The matings were : — E M 29 X M 10 gave selfs, 

 4 marked, and 1 Dutch ; E M 29 x E M 27 gave 1 self, 3 marked, 

 and 1 Dutch; S 7 X E M 28 gave 2 selfs, 5 marked, and Dutch. 



