16G Symmetry of Egg and Symmetry of Embryo in the Frog 
TABLE XV II I. 
Correlations 
Positive Series 
Negative Sei 
16 S 
Pay 
Ppy 
A. 
In light throughout 
•096 
•562 
•769 
-•140 
•789 
-•719 
B « 
In darkness till segmentation 
•223 
•586 
■659 
- ^328 
•724 
- -839 
B^ 
. In darkness till dorsal lip 
•282 
•588 
•610 
- ^504 
•863 
-•872 
In the next two tables (XIX., XX.) are given the equations to the regression 
lines (mean vahies of each angle in terms of one other) and variabilities of each 
when one other is constant. 
TABLE XIX. 
Begressioii Lines ... 
Positive Series 
Negative Series 
a = 
/3 = 
7 = 
^= 
7 = 
A. In light through- 
out 
B a. In darkness till 
segmentation 
B /3. In darkness till 
dorsal lip 
•074/3 + 26-30° 
•361 y + 28-77° 
-307(3 + 18-40° 
•452 y + 25-94° 
•272/3+18-80° 
-482y + 27-12° 
•124a + 25-78° 
- -639 y + 28-77° 
■340a + 16^58° 
-•548y + 25^.94° 
•292 a +20-20° 
-•518y+27-12° 
•876 a -25-78° 
-•926^ + 26-30° 
-660 a -16-58° 
--693/3 + 18-40° 
-708 a -20-20° 
--728/3+18-80° 
--158^-30-50° 
-554 y- 2-48° 
--218/3-19-25° 
-351 y- 6-13° 
--489/3-12-32° 
-490 y+ 0-02° 
- -1400 + 20 02° 
--446y- 2-48° 
- -494a + 17-57° 
--649y- 6-13° 
--520a + 13-13° 
--510y+ 0-02° 
-M40a- 20-02° 
-1-158/3-30-50° 
l-494a- 17-57° 
-1-218/3-19-25° 
l-520a + 13-13° 
-1-489/3- 12-32° 
TABLE XX. 
Positive Series 
Negative Series 
Variabilities 
of a or /3 
when 7 is 
constant 
of /3 or y 
when a is 
constant 
of a or y 
when /3 is 
constant 
of a or /i 
when y is 
constant 
of ^ or y 
when a is 
constant 
of a or y 
when j3 is 
constant 
A. 
In light throughout 
1-207 
r879 
1 ^453 
1 ^039 
1-482 
1^675 
Ba. 
In darkness till segmentation 
1 -326 
1-649 
1 ^532 
1-141 
2^352 
1^561 
B/3. 
In darkness till dorsal lip ... 
1 -358 
r668 
V609 
0-893 
r575 
r528 
