FAMILY EECOED. 41 



1942.3 9 A. E. G. (b. Dec. 16, 1910). Photographs and radio- 

 graphs of her hands prove that she is free from brachyphalangy. The 

 lengths of II 2 and IV 2 are 15 and 19 nun. respectively on both hands. 



1942.4 cf E. L. H. G. (b. July 1, 1912). Photographs and radio- 

 graphs from his hands prove that he is free from brachyphalangy. The 

 lengths of II 2 and IV 2 are 17 and 19 mm. respectively on both hands. 



1942.5 & A, M. G. (b. Aug. 16, 1914), A photograph and a radio- 

 graph of his hands are given in fig. 28 and fig. 52. The radiograph 

 shows that the second phalanges of the indices are markedly shortened, 

 even shorter than the corresponding phalanges of the fifth fingers. 



The epiphysial cartilages are present and the external aspect of the 

 hands makes it clear that we are here dealing with the B-type of 

 brachyphalangy. The lengths of II 2 and IV 2 are 8 (?) and 15 mm. 

 on the right hand, 9 and 15 mm. on the left hand. The individual is 

 genetically heterozygous for the factor for brachyphalangy. 



Summing up, we have been able to show that the B-type brachy- 

 phalangous 194.2 cf A. K. A. G. has one B !-type brachyphalangous 

 child by his first marriage. By his second marriage he has 3 normal 

 children and one child brachyphalangous of the B-type. 



Eighth Family of V Generation. 



The B-type brachyphalangous 194.3 cf E. A. L., by his marriage 

 with the normal A. M. S., has 5 children, 1943.1-1943.5. 



1943.1 cf E. A. L. (b. June 26, 1899). The photographs and radio- 

 graphs, figs. 29, 30, and 53, are typical for a case of B-type of brachy- 

 phalangy. The shortening of the distance between the two distal 

 grooves of the index fingers is very marked and can be noticed both 

 from the dorsal and volar surface of the hand. The lengths of II 2 

 and IV 2, measured from the radiographs, are 22 and 29 mm. on the 

 right hand, 21 and 29 mm. on the left hand. 



In Pfitzner's material only 1 out of 301 normal hands is foimd which 

 shows the same lengths of II 2 and IV 2 as in the right hand of this 

 individual. This case represents an extreme variation, but it fm-nishes 

 us with another example analogous to that of 1151.2 9 S. R., dis- 

 cussed above. 



The brachyphalangous condition of this individual is clearly indi- 

 cated, however, by the external aspect of the hands; and the relative 

 lengths of II 2 and IV 2 of the left hand fall outside the limits of 

 extreme variation in normal hands. 



The individual is genetically heterozygous for the factor for brachy- 

 phalangy. 



1943.2 cf H. J. L. (b. Aug. 26, 1900) . His hands are perfectly normal 

 as shown from photographs and radiographs. Lengths of II 2 and IV 2 

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

 the left hand. 



