44 THE MENDEL JOURNAL 



each finger has (like the thumb) only two bones and 

 one joint, and the same is true of the toes. 



The bonev=^ of the palm show certain peculiarities, 

 but as they are of no special interest I shall not 

 describe them here. 



The external aspect of the hand is very charac- 

 teristic (Plates 2 and 3). It is short, and looks unduly 

 broad. Each finger shows only one crease, corre- 

 sponding to the single joint. These points are well 

 seen in Plate 3, where the abnormal hand of a man 

 is shown above that of his normal brother. 



Length of Hands. 

 The average length of the hands was as follows : — 



Symmetry. 



In every individual the two hands are sym- 

 metrical, the peculiarities of one hand being accurately 

 duplicated in the other, as shown both by photo- 

 graphy and by radiography. The same is probably 

 true of the feet, though in most cases only one foot 

 was examined. 



The shortening of the hands is thus seen to be 

 almost entirely due to the abnormality of the fingers. 



