176 THE MENDEL JOURNAL 



in both families at the third birth. Nos. 13 — 14, Gener- 

 ation C, occur in the middle of a large family, and Nos. 

 27 — 28, and 31 — 32, and 37 — 38 of the same generation, 

 were pretty uniformly arranged throughout the household 

 of twenty-one children. 



In this Pedigree, too, there is a further difference 

 as compared with Pedigree A. In the present case, 

 the twin-bearing capacity seems evidently capable of 

 transmission through the male as well as through the 

 female, and not exclusively through the latter as in 

 Pedigree A. From the construction of the Chart it 

 seems clear that the quality of producing twins came 

 from Generation B, though no member of that generation 

 was one of twins. And this generation must equally 

 have inherited it from one or other parent in Genera- 

 tion A, concerning which little is known. But in 

 Generation B, No. 4, a male transmitted the twin- 

 bearing capacity which is manifested in Generation C, 

 in Nos. 27—28, 31 — 32, and 37—38. In the case of all 

 the other members of B Generation, however, the qualitj' 

 was transmitted by the female. And in Generation C it 

 was similarly transmitted by females. 



The Facts of the Pedigree. 

 Generation A. 

 Nos. 1 and 2. The common ancestors of the thirteen 

 families shown in this pedigree. 



Generation B. 

 Nos. 1 — 4. Nothing of importance was ascertained. 

 This is an interesting family group, as ever}' member of 

 it has transmitted what has been described above as the 

 quality of producing twins. 



Generation C. 



Nos. 1 — 8. Of these children, the two at the last 

 birth but one were female twins. 



No. 9. A male child. Was burnt to death in child- 

 hood. This is merely recorded here as presumptive 

 evidence of parental neglect. 



Nos. 10, 12, and 16. A male and two females respec- 

 tively. Nothing of importance at present known. 



