544 



PRODUCTION OF PARTHENOGENETIC FROGS 



TABLE I. 



The results of a series of experiments made on the eggs of a sec- 

 ond lot of frogs received later confirmed these results (Table II). 



TABLE II. 



It is, therefore, obvious that only those eggs were capable of devel- 

 oping which were punctured on the 1st or 2nd day while later they 

 lost their power of developing or lost their vitality. It may be 



