86 



The Journal of Heredity 



HIND FEET OF THE POLYDACTYLOUS COW SHOWN IN FIG. 27 (FIG. 29) 



FRONT FEET OF THE POLYDACTYLOUS COW SHOWN IN FIG. 27 



Note ihf small s'l/.v and asymmclriral p :)sitioii of tlv cxtr.i to.'s. in lliis case tin- Polydactyly 

 appears to be due to the recurrence of a latent ancestral dinit and is thus comparable to Poly- 

 dactyly in guinea pigs. In human and feline Polydactyly there is a symmetrical redu|)lication of 

 one or more of the digits apparently due to an irregularity in (N'M-iopmciit which is without 

 atavistic significance, (l-'ig. M).) 



