346 WHITMAN AND EYCLESHYMER. (Von. XII: 
Ecc. Empryo VISIBLE. ANGLE WITH First Groove. 
II 5-30 AM. May 15 702 
12 5 AM. st 35° 
13 5 A.M. ss 45° 
14 5 A.M. = 88° 
I5 Died in late cleavage 
16 5aA.M. May 15 Ac. 
17 5 AM. s ae 
18 5 A.M. « 7O4 
19 5 A.M. She 
20 5 A.M. ss 85° 
Third Series. — At 10.30 A.M., on the same day, a third lot 
of five eggs, in which the third set of grooves had begun, were 
fixed in position. Only three of these formed embryos. 
Ecc. Embryo VISIBLE. ANGLE WITH First GRoove. 
21 6 a.M. May 15 go° 
22 Died 
23 Died 
24 GyicM teks 30° 
25 Sol 5eA-Ma : {O° 
The results may be summarized as follows: 
1. Angles formed by median sagittal plane of embryo and 
first cleavage plane : 
In 10%, coincidence. 
In 10%, less than 5°. 
In 20%, greater than 5° and less than 45°. 
In 10%, 45°. 
In 35%, greater than 45° and less than 85°. 
In 10%, greater than 85° and less than go°. 
In 5%, 90°. 
2. Angles formed by the median sagittal plane of the embryo 
and the second cleavage plane: 
In 5%, coincidence. 
In 10%, less than 5°. 
In 35%, greater than 5° and less than 45°. 
In 10%, 45°. 
In 20%, greater than 45° and less than 85°. 
In 10%, greater than 85° and less than go°. 
In 10%, 90°. 

