FAMILY RECORD. 37 



langy and needs no special description. The radiographs (fig. 45) show 

 the degree of the shortening. The second phalanges of the indices 

 are reduced to very short bones with two surfaces in articulation with 

 the I and III phalanx. 



In this case we were able to secure radiographs from the feet also. 

 They show exactly the same shortening of the second phalanges of the 

 toes, a further control of the fact stated above that the brachyphalangy 

 shows vertical correspondence. 



The lengths of II 2 and IV 2 of the right hand are 9 and 28 nmi. 

 respectively, and on the left hand 8 and 27 mm. 



This individual is genetically heterozygous for brachyphalangy. He 

 represents the sixth generation of brachyphalangous individuals among 

 the descendants of 1 ? M. K. H. We have been able to trace the 

 inheritance of the malformation without any break from her (1 9), 

 through 1.1 9, 11.5 cf, 115.1 9,1151.2 9 to the family member in 

 question (11512.1). All of these were brachyphalangous and genet- 

 ically heterozygous for the factor. Among them are the most pro- 

 nounced cases of the B !-type of the malformation (11.5 cf) as well 

 as of theB-type (1151.2 9). 



Fourth Family of VI Generation. 



The normal 1151.3 cf S. G., by his marriage with the normal J. A., 

 has 1 daughter, 11513.1 9. 



11513.1 9 E. G. (b. Oct. 10, 1911). Photographs and radiographs 

 prove that she is normal. Lengths of II 2 and IV 2 are 16 and 19 

 mm., respectively, on the right hand, 16 and 18 mm. on the left. 



We have now given a complete family record concerning all mem- 

 bers of line 1 and line 7, including in all 58 individuals. 



As already mentioned we have not yet worked out any of the other 

 lines to the same extent. In one of the lines, line 9, where brachy- 

 phalangy occurs, we have secured material (photographs and radio- 

 graphs) of the hands of members of the IV, V, and VI generation that 

 are now living. These are of special interest because they furnish 

 valuable data for a comparative study of the two types of the mal- 

 formation we are dealing with. This supplementary material will 

 now be presented. The discussion of the facts obtained will be post- 

 poned until this is done. 



Line 9. 



The B !-type brachyphalangous 1.9 cf F. J. p. (II generation, p. 

 24), by his marriage with the unrelated C. R., from Asker near Chris- 

 tiania, had 9 children, 19.1-19.9 (III generation). One of them, 

 19.4 9 L. E. 0. (Nov. 10, 1838-Nov. 25, 1908), married in 1857 the 

 normal L. J. A., a builder. They had by their marriage 10 children, 



