

Zr, 

ONE STRONGLY DEVIATES. (217) 25 
brachycephalic. We may presume here a segregation, according to the 
formula DR x RR with prepotence of the mother through ancestral 
influence; also according to the formula DR x DR and then classify 
the family into table I (the parents are 79 and 81, the children 77, 78, 
#9, 79,80, 80, 82, 86). 
Family 179a. A special case. The indices of parents differ much. 
The father is in a high grade brachycephalic (84) with a head somewhat 
below average large. The paternal grand-mother is macrodolichoceph- 
alic (74). One brother and two sisters of the father’s (1920b, B 179) are 
brachycephalic with different large heads. Of 4 children 2 daughters 
and one son are dolichocephalic (76—77) and one son is macrobrachy- 
cephalic (89). Here the children have a very much diverging index. 
According to the formula DR x RR we may accept segregation, but 
it is very peculair that the son, a heterozygote, just as the father, has 
such a high index (89). The brachycephalic element in a heterozygote 
form, so, in a single dose, gives here an index which belongs to its 
utmost values (p. 41). 
Of the incomplete families family 154 consists of 5 sisters, all with large 
heads: the indices are 75, 78, 79, 79.5 and 82.5. Family 216 consists of 
8 brothers and sisters with the indices 75, 77, 78, 78, 79,79, 79.5 and 
81; the headsizes are diferent. This family might have better taken up 
into table IV. ; | 
Of the 5 cases of this group, consequently the families 4la, 245, 215, 
339a and 179d, are of family 4la both parents dolichocephalic. The 
paternalgrand-father is brachycephalic. So, as regards the father, there 
can be present reversed dominance (see p. 34). As for the other families, 
one of the parents is brachycephalic, so they can segregate according 
to the formula DR x RR = DR + RR. As we saw, it is especially 
family 245 which causes some difficulties for this interpretation all six 
children of one of the daughters being here brachycephalic (see p. 24). 
b. The deviating index is brachycephalic and belongs to a small 
head. 13 of the 20 families and 8 ofthe 15 incomplete ones. 
Family 22e. The father is dolichocephalic and has a head somewhat 
- smaller than average large. Of the paternal grand-parents the grand 
father has a very large head and is dolichocephalic, the grand-mother 
has an average large head and is brachycephalic. The mother is macro- 
dolichocephalic. Three brothers of the father’s are dolichocephalic as 
the paternal grand-father, and 4 sisters are brachycephalic as the 
