438 Tricotylous Races. 
were planted out in the summer of 1893 and eight of 
them yielded an ample quantity of seed. In each lot, of 
from 200 to 1300 seedlings, I counted the percentage of 
tricotyls and found most of them to be distributed be- 
tween 2 and 15%, the highest numbers being 24 and 
32% (these latter amongst 1300 and 1060 seedlings re- 
spectively). The mean was 11%. 
Therefore the original plant obviously belonged to a 
tricotylous intermediate race, a fact which, however, was 
only proved by the behavior of its descendants. 
In the spring of 1894 I only planted out the tricotyl- 
ous offspring of a parent with 32%, and obtained 22 
plants which set seed. From these I obtained in the 
following year 22 hereditary values which were distrib- 
uted between 26 and 55% and reached a mean of 37%. 
There were three individuals with 54 55 and 55%. We 
see that the mean was higher than the corresponding 
value of the parent plant, and from this we conclude that 
regression did not take place in the direction of 0, but 
towards the other side; and this is exactly what should 
happen in the isolation of new races from their mix- 
tures. 
In the summer of 1895 I planted out tricotylous off- 
spring from the two parents with 55% ; I kept them in 
two groups and determined their values from the har- 
vests of 31 individuals. There was no essential differ- 
ence between the two groups ; the numbers were dis- 
tributed between 26 and 73 and their mean was 53%. 
The mean had, therefore, reached the value of the parent, 
and the race could be regarded as an intermediate race, 
isolated but not yet subjected to selection. 
For the next generation I selected the tricotylous 
offspring of three plants with 66 68 and 73%. Of 
