144 J- F - MCCLENDON. 



fresh water before removal of the sexual organs, and after a male 

 had been opened my instruments and hands were washed in like 

 manner, to remove all spermatozoa. A check of unfertilized 

 eggs was always kept, and in case some eggs developed in the 

 check, the material was thrown out. In a number of experi- 

 ments the eggs were fixed and sectioned as a further check. 



