578 
Journal of A gricultural Research voi. xxiii. No. n 
Tabi,e X .—Number and position of nipples of wild boars and descendants —Continued. 
Number and frequency of pair— 
4 ^ 
5 
sK 
6 
Inguinal. 
Number of nipples. 
Frequency mammae. 
Frequency variations. 
7 
6.48 
ss 
85.29 
14.71 
2 
2. 94 
7 
87.5 
12.5 
Ill 
99. I 
•9 
Evidently the smaller number of mammae possessed by the wild race 
is inherited to some extent, but whether as an independent character or 
because correlated with other body structures is not disclosed by these 
data. 
Using the data in Table VIII and arranging the pairs in the order of 
frequency of variation, the following sequence results: Sixth, second, 
fifth, third, fourth, seventh, and inguinal. (The eighth was discarded 
because of small numbers.) This sequence duplicates exactly that found 
in the original study, except that there was no seventh pair in those 
animals. 
The rank of the point of most frequent appearance of the triangle 
pattern is as follows: 
Percentage 
of total. 
Percentage 
of pigs of 
the wild 
cross. 
Between fifth and sixth. 
9-39 
8-33 
7. 22 
2.94 
Between sixth and seventh. 
Between second and third. 
5-36 
6.48 
. 9 
Between fourth and fifth.. 
3- 29 
1.11 
Between third and fourth. 
Between first and second. 
.56 
This agrees almost exactly with the previous results. (The triangle 
at is not included because of the small numbers.) 
The rank of the point of most frequent suppression of a nipple was as 
follows: 
Percentage 
of total. 
Percentage 
of pigs of 
the wild 
cross. 
Second pair. 
5 - 33 
3-89 
I. 82 
I. 02 
•74 
•55 
•36 
6. 25 
3 - 70 
Fourth pair. 
Sixth pair. 
Fifth pair. 
1 . 47 
.89 
.89 
.89 
First pair... 
Third pair. 
Inguinal pair.. 
