1922] 



Bees: The Micro-Injection of Faramaccium 



241 



TABLE IV 

 Injections with Askaron 4 mo. per cc. in Tap HoO 



CONCLUSIONS 



1. Micro-iujectioii has been used in a comparative study of the 

 effects of the toxins of Ascaris on Paraniaccium when taken in through 

 the cytostome and when introduced directly into the living cytoplasm 

 by the pipette. 



2. It has been found that the solution of askarou is not fatal to 

 Paramaeciutn when ingested through the cytostome, and it is no more 

 fatal when injected into the living cytoplasm than is its solvent. 



