276 



DAVID DAY WHITNEY 



B 



Fig. 3 Diaschiza sterea. A, female; B, male; C, parthenogenetic female 

 egg; £>, parthenogenetic male egg; E, fertilized egg. 



Diagram 4 Diaschiza sterea. Experiments 10, 11, 12, 16, and 17 of table 2. 

 Showing the percentage of males produced when the diets were changed. P 

 indicates the feeding of a Polytoma diet, G indicates the feeding of a Chloro- 

 gonium diet. 



