EFFECTS OF CARBON DIOXIDE ON EGGS 



357 



Text figures A to C 



may, in rare cases, find fully seven-eighths of the worm normally 

 formed, or we may find nothing but a pointed stump; figure B 

 gives a fairly typical case. 



An example of the second type of embryo is given in figure C. 

 Such individuals are found in about 40 per cent of the cases (66 

 cases in 165). The greatest variation is noted in the appearance 



