26 Psyche [February 
TABLE I. 
Matings 
Combined 
Probable 
type of 
Mating 
Expected 
Found 
Deviation 
divided by 
probable 
Error 
Probable occur- 
ence of such de- 
viations due to 
chance alone 
during 100 repe- 
titions of the 
same experiment, 
other things being 
equal. 
1, 2, 3, 4 
3, 11, 12, 
15, 17, 18 
83.5:27.5 
82:29 
0.4 
5 
1, 7, 8 
17 5:17.5 
19:16 
0.7 
6, 7, 8 
* 2 
34.5:11 .5 
36:10 
0.7 
10, 11 
9 
16:0 
16:0 
0.0 
12 
5. 
17:17 
11:23 
3.0 
4.3 
9, 13, 14 
13 
25.5:25.5 
25:26 
0.004 
15 
4 
16:0 
16:0 
0.0 
16? 17? 18? 
19, 23, 24 
18 
46:46 
52:40 
1 .8 
22.47 
20, 21, 25, 
26, 27, 28 
6, 20, 21 
47:0 
46:1 
cannot be 
calculated 
22, 29, 30 
19 
46:46 
46:46 
0.0 
In this analysis I have accounted for some 540 individuals 
resulting from 27 matings. I have omitted three matings (Nos. 
16, 17 and 18) in which we cannot be sure what the parents were 
genetically and in which we cannot recognize the ratios definitely. 
The results from a mathematical standpoint are close ap- 
proximations of those expected. The highest deviation from the 
expected for any group is barely three times the probable error. 
This, from a statistical point of view, is probably insignificant. 
The same deviation would be expected under normal conditions 
of chance 4.3 times in 100 repetitions of the same experiment, 
other things being equal. 
