FAMILY EECORD. 43 



may be concluded from these data is that brachyphalangy occurs in 

 the offspring of 194.5 9 L. E. A., and that she herself is heterozygous 

 for the factor for the malformation. As to the type of her son's brachy- 

 phalangy no conclusions can be drawn. 



Twelfth Family of V Generation. 



The B-type brachyphalangous 194.7 9 S. A., by her marriage with 

 the normal Aa, has 1 daughter, 1947.1 9 . 



1947.1 9 E. Aa. (b. 1908). She is, as the photographs (figs. 35, 36) 

 and radiographs (fig. 56) indicate, brachyphalangous of the B-type. 

 The lengths of II 2 and IV 2 are 15 and 21 nam. respectively on both 

 hands. The epiphysial cartilages of the affected phalanges are present. 

 The individual is heterozygous for the factor for brachyphalangy. 



Line 9, VI Generation. 

 First Family of VI Generation. 



The B-type brachyphalangous 1942.1 9 J. G., by her marriage with 

 the normal, unrelated 0. P. H., has had 3 children, 19421.1-19421.3. 



19421.1 cf F. L. H. (July 6, 1905-Jan. 29, 1907) and 19421.2 cf 

 S. V. H. (Oct. 4, 1906-May 4, 1907). Both died young and according 

 to the statement of their mother they had normal hands. 



19421.3 cf R. F. H. (b. June 26, 1911). Radiographs of his hands 

 (fig. 38) prove that he is free from brachyphalangy. Lengths of II 2 

 and IV 2 are 18 and 21 nun. respectively on the right hand, 18 and 20 

 mm. on the left hand. 



Summing up, it is probable that the three children of the B !-type 

 brachyphalangous 19421.1 9 all have been free from brachyphalangy. 

 The possibility that one or both of the two sons who died young may 

 have been brachyphalangous of the B-type can not, however, be 

 excluded. 



The supplementary material we have been able to obtain within the 

 "line 9" of the family comprises radiographs and photographs of 10 

 brachyphalangous and 6 normal individuals. The interesting point 

 here is that the B-type of the malformation seems to be prevailing 

 within this line, descending from the B !-type brachyphalangous 1.9 

 cT F. J. 0. In only one case have we seen the B !-type occur among 

 his descendants; and a limited investigation would easily have led to 

 the conclusion that all the brachyphalangous individuals of this line 

 belonged to the B-type, in striking contrast to what was the case in 

 "line 1." 



