28 



ORIGIN OF A POLYDACTYLOUS RACE OF GUINEA-PIGS. 



TABLE 14. Character of the yoiing of $ 3046 (GG], generation V. 



TABLE 15. Sires grouped by generations of polydactylons ancestry. 



[The numerals in parenthesis indicate rank in potency of transmission of the polydactylous character. Descent is 



shown in the male line only.] 



TABLE 16. Frequency of occurrence of the extra-toe in its several 

 degrees of development on the two sides of the body. 



TABLE 17. Character of the young produced by a mating between a normal (W) male and 

 females either polydactylous or of polydactylous ancestry. 



