PLATE 2 
EXPLANATION: OF FIGURES 
SA, Band C Lateral view as above. Two Vs and one long rod. 
9A and B- Lateral view of anaphase plate. Tripolar figure. 
Arbacia 2 X Toxopneustes & cross 
10-17 Lateral views of anaphases of the first division. 
10A, Band C The Vs and long rod characteristic of Toxopneustes may be 
seen. 
11A, B and C Long rod and Vs. Some of Toxopneustes chromosomes lag- 
ging. 
12A, Band C Toxopneustes Vs not present. Probably some of the Arbacia 
chromosomes have been eliminated. 
13A and B- One Toxopneustes V and long rod. Lagging and elimination as 
in fig. 12. 
408 
