33S 



X. VATSU: OBSERVATIONS AND EXPERIMENTS 



Fig. II (all the ligures x 40). 9 and 10, 16-tell stages resulting horn an 

 pgg operated upon as in the accompanying diagram ; II, 12, 16 cell stage result- 

 ing from two different cuts ; 13, 14. half-cleavage of an egg cut vertically; 

 15, 16-cell stage of an egg cut horizontally ; 16. 17. the same of an egg cui 

 as in the diagram vrhich is bet.v^en th°s2 two figures. 



