XV 



MAN 



171 



grees at present available deal with characters which are 

 usually classed as abnormal. In some of these the in- 

 heritance is clearly Mendelian. One of the cases which 



Fig. 32. 



Normal and brachydactylous hands placed together for comparison. 

 (From Drinkwater.) 



has been most fully worked out is that of a deformity 

 known as brachydactyly. In brachydactylous people the 



