42 A NEW TYPE OF BRACHYPHALANGY IN MAN. 



1943.3 cf H. R. L. (b. Feb. 28, 1902). His hands are normal, as 

 shown by photographs and radiographs. Lengths of II 2 and IV 2 

 are 24 and 29 mm. respectively on the right hand, 25 and 30 nrni. on the 

 left hand. 



1943.4 9 E. M. L. (b. Aug. 1, 1903). The photographs (figs. 31, 32) 

 and radiographs (fig. 54) of her hands give us a typical case of the 

 B type of brachyphalangy. The volar surface of the indices shows the 

 characteristic shortening of the distance between the second and third 

 grooves of the indices. The lengths of II 2 and IV 2, measured from 

 the radiographs, are 21 and 29 mm. on the right hand, 20 and 29 mm. 

 on the left hand. The epiphysial cartilages of the shortened phalanges 

 are present. She was 14 years old when the radiographs were taken. 

 She is heterozygous for the factor for brachyphalangy. 



1943.5 9 E. S. L. (b. Dec. 30, 1907) represents, as the photographs 

 (figs. 33, 34) and radiographs (fig. 55) demonstrate, a very characteristic 

 case of the B-type of brachyphalangy. The distance between the 

 second and third grooves of the indices is characteristically shortened. 

 The second phalanx of the index of the left hand is a httle irregular in 

 shape. This calls forth a slight bending in the radial direction of the 

 terminal phalanx of this finger. The epiphysial cartilage is present in 

 both the affected phalanges. The individual was 10 years old when 

 the radiographs were taken. 



The lengths of II 2 and IV 2 are 13 and 22 mm. respectively on both 

 hands. The individual is genetically heterozygous for the factor for 

 brachyphalangy. 



Summing up, we find that the B-type of brachyphalangous 194.3 

 d^ E. A. L. has 2 normal and 3 B-type brachjrphalangous children. 



Tenth Family of V Generation. 



194.5 9 L. E. A., by her marriage with the normal E., has 6 children, 

 1945.1-1945.6. 



E. (b. 1893). 

 (b. 1895). 

 1896). 

 (b. 1898). 

 (b. 1899). 

 (b. 1902). 



The information obtained concerning this family is very unsatis- 

 factory. Their mother states in a letter: 



"We have one son in our family who has both index fingers shorter than 

 they ought to be. It is the end of the finger, the joint nearest to the nail 

 which is shorter than it ought to be. It looks as if he had no joint there; he 

 can not bend it." 



Several attempts to obtain a better description or photographs have 

 failed, and we have therefore refrained from paying any attention to 

 the information in the discussion. The only thing which probably 



