J. W. Jenkinson 
153 
The material is divided into two series, positive and negative. In the first the 
Sagittal Plane and the First Furrow (up to 90") are on the same side of the Plane 
of Symmetry, either on the right or on the left, a is then taken as positive and 
less than 90", /3 is positive and less than 180° (the angle being measured between 
" grey crescent " and " dorsal lip ") while 7 may be positive or negative and is less 
than 180°. 
In the second, or negative series, the Sagittal Plane and First Furrow are on 
opposite sides of the Plane of Symmetry. /3 is taken as positive and less than 180°, 
a is taken as negative and is less than 90°, while 7 is the sum of the two of them, 
and is negative. 
a and are then correlated, and the coefficients pa_y, p^y found by the formula. 
The results are given in the tables (Tables VII. to X., (a) positive scries, and 
(6) negative series) and summarized in Table XL 
TABLE VIL 
I. Eggs Close. Axes Horizontal. 
a. Positive series, = •362. h. Negative series, p^.^^ — I'db. 
180 
3 
Totals 
I So 
Totals 
90 
2 
1 
1 
1 
1 
5 
3 
1 
3 
6 
24 
1 
1 
1 
4 
4 
9 
22 
1 
1 
1 
3 
4 
6 
6 
4 
5 
7 
38 
1 
5 
] 
1 
1 
1 
17 
1 
1 
4 
4 
8 
8 
9 
42 
2 
1 
2 
2 
3 
6 
16 
a 
1 
1 
1 
1 
3 
11 
11 
12 
19 
60 
a 
2 
2 
1 
2 
2 
3 
6 
10 
28 
1 
1 
2 
3 
10 
19 
30 
60 
2 
1 
4 
3 
7 
20 
37 
1 
2 
1 
4 
8 
23 
43 
82 
2 
2 
1 
2 
5 
10 
22 
47 
91 
Totals 
5 
1 
2 
5 
3 
6 
12 
18 
34 
42 
70 
114 
312 
Totals 
G 
4 
2 
0 
9 
6 
15 
23 
43 
99 
211 
TABLE VIII. 
II. Eggs Close. Axes Vertical, 
a. Positive series, = '409. b. Negative series, p^^ = — "2.52. 
3 
Totals 
13 
Totals 
90 
90 
1 
1 
5 
7 
7 
9 
5 
40 
2 
2 
2 
1 
3 
10 
12 
37 
1 
1 
1 
1 
8 
10 
6 
13 
46 
1 
E 
1 
1 
2 
2 
3 
2 
7 
19 
1 
1 
4 
13 
14 
20 
11 
64 
1 
1 
1 
1 
1 
1 
3 
2 
11 
22 
a 
4 
16 
15 
30 
23 
88 
1 
1 
2 
8 
13 
25 
5 
16 
32 
39 
92 
2 
1 
1 
6 
8 
31 
49 
2 
4 
5 
10 
35 
106 
162 
z 
1 
3 
9 
25 
94 
132 
Totals 
3 
1 
0 
2 
0 
2 
7 
25 
56 
68 
131 
197 
492 
Totals 
3 
1 
0 
1 
4 
4 
5 
10 
28 
55 
168 
284 
Biometrika vii 20 
