182 



BIOLOGY OF THE PROTOZOA 



He also showed that the nature of the motor response in some 

 organisms, e. g., in Stentor, is correlated with the physiological 

 state of the organism, and adduced evidence which indicates that 

 phenomena of fatigue are involved. The classical example of a 



Fig. 96,-Merotomy in Euplotes patella. (After Taylor.) >./., AnaUirri fibers; m., 

 motorium; m. f., membranelle fiber. (See also Fig. 72.) 



motor response, formerly interpreted as chemiotaxis, is the case of 

 Paramecium caudatum or aurelia in a drop of dilute acid. Casual 

 swimming brings the individual to the outer limit of the drop; the 

 transition from water to drop does not provide a stimulus strong 



