Centrifugal Force upon Beetles' Eggs 



537 



TABLE XI 

 Calligrapha lunata 



TABLE XII 

 Leptinotarsa decemlineata 



Interval \ 

 Number of ' Age when cen- Length of time between end oi 

 experiment trifuged centrifuged ' experiment 



and fixation 



Orientation 



Remarks 



7 days 

 10 days 

 6 days 



8 days 



post, pole in did not hatch 



hatched in 6 days 



7 days , ant. pole in did not hatch 



" hatched in 6 days 



