0 
164 Symmetry of Egy and Symmetry of Embryo in the Frog 
TABLE X. 
Table showing the dates of the Several Eccperiments and the Parentages 
of the eggs used in each. 
Experiment 
A 
B 
C 
D 
E 
F 
G 
H 
H' 
K 
J 
I 
N 
0 
Date 
30 iii. 06 
31 iii. 06 
1 iv. 06 
2 iv. 06 
J) ?> 
3 iv. 06 
Parentage 
one $ one $ 
one $ j 
^ \ one 9 
one $ + 
one 
one $ one $ 
one $ one $ 
one 
- one $ . 
one (J 
one $ 
In Tables XI. — XIII. the frequencies in the individual experiments of each 
class of angle are set forth. 
(a) With regard to the First Furrow and the Sagittal Plane (Table XI.). 
It is evident that in some experiments {A, F, G, H, I, N, 0) the two planes 
tend to coincide, while in the remainder the distribution is almost at random. 
This difference is, however, clearly not due to the length of time the eggs 
remained in the uterus, for A and 0, for example, are respectively at the beginning 
TABLE XL 
First Furro^v and Sagittal Plane. 
Frequencies in the Individual Experiments. 
Experi- 
ment 
Frequencies 
A 
2 
3 
2 
1 
2 
4 
5 
8 
6 
15 
6 
8 
3 
4 
1 
1 
1 
B 
1 
2 
1 
3 
3 
4 
3 
5 
4 
4 
5 
4 
5 
2 
2 
3 
2 
1 
C 
3 
4 
5 
8 
3 
3 
2 
1 
5 
2 
3 
5 
2 
8 
1 
4 
D 
.5 
2 
2 
1 
1 
I 
1 
1 
3 
1 
2 
3 
E 
1 
4 
5 
5 
4 
3 
2 
4 
5 
2 
2 
4 
4 
5 
5 
9 
6 
3 
F 
2 
1 
1 
1 
1 
3 
7 
7 
16 
6 
7 
1 
1 
1 
G 
1 
1 
1 
3 
4 
6 
5 
4 
3 
2 
1 
2 
H 
1 
4 
1 
3 
2 
9 
6 
15 
12 
3 
4 
2 
2 
1 
3 
1 
K 
7 
4 
2 
3 
5 
2 
5 
1 
6 
5 
3 
3 
2 
5 
5 
4 
3 
7 
J 
2 
4 
1 
8 
4 
.5 
3 
3 
5 
8 
2 
9 
1 
3 
I 
1 
1 
1 
6 
3 
13 
3 
8 
2 
1 
3 
1 
N 
2 
1 
2 
5 
4 
7 
9 
13 
10 
8 
5 
4 
4 
2 
2 
3 
0 
1 
1 
1 
2 
8 
3 
7 
7 
7 
13 
4 
1 
3 
2 
2 
6o 
5° 
+ 
6o 
go 
