ELEMENTARY BIOLOGY. [CHAP. in. 



active, but ultimately cease, the pseudopodia-like 

 processes being all retracted and the whole forming 

 a motionless sphere. 



Let the specimen cool again ; the movements are 

 not resumed ; the protoplasm having passed into a 

 state of permanent coagulation or rigidity. 



Repeat the above observations on the white blood- 

 corpuscles of the frog or newt. 



