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CLAUDE W. MITCHELL 



general pedigree series which served as general controls. To the 

 remaining thirty-four no food was given for a period of twenty- 

 four hours. They were then again examined microscopically and 

 developing ova noted. Food was now added to these starvation 

 cultures and in all but four cases it was ingested. With four in- 

 dividuals death followed starvation. In the others growth was 

 resumed and male or female young were produced. Eighty per 



TABLE 3 



Isolation cultures under normal food supply 



