51 
1907-8.] An Account of a Brachydactylous Family. 
Many normal members of the family have been measured in order to 
make comparisons with the abnormals. It has not been possible, how- 
ever, to get a complete series of the measurements of the normals. 
For comparison they have been placed in three groups. The first group 
contains all adults over 21 years of age. This is divided into two sub- 
groups — (a) males, ( b ) females. 
The second group contains males and females from 14 to 21 years 
of age. 
The third group contains children from 1 to 3 years, with an 
average age of 2 years both in the normals and abnormals. 
Fig. 10 shows, in diagrammatic form, the average abnormal adult 
Sc a lb - \ inch to l Toot 
Fig. 10. 
male in comparison with the average normal adult male as to height, 
span of outstretched arms, reach of right hand, thigh, and leg. 
Thus it is seen that the measurements of normals is in excess of the 
abnormals in every particular in Classes I. and II., the greatest pro- 
portional difference being in the length of the finger and in the span of the 
outstretched arms — the latter including the sum of the differences of both 
upper extremities. The femur seems to be shortened in about the same 
proportion as the tibia, taking into consideration the extra normal lengths. 
Class III. 
The young children present a striking and unexpected contrast to the 
rule that holds good in adults and youths. The abnormal children of an 
average age of 2 years are actually J inch taller than the normal of the 
