DESCEIPTION OP BBACHYPHALANGY STUDIED. 19 



with two distinct sonmtical types of brachyphalangy. They will in 

 the following be characterized respectively as the simply brachypha- 

 langous or "B-type" and the very brachyphalangous or "B!-type." 

 It needs no special explanation to show that this presence of the 

 B-type, which in some cases seems to overlap the extreme variations 

 in normal, not brachyphalangous hands, makes it necessary to examine 

 and especially to procure radiographs from all the members of the 

 family — ^not only the evidently brachyphalangous members, but also 

 those who from a superficial examination seem to be normal. If this 

 had not been done the whole pedigree would have been full of mistakes 

 and contradictions. 



