Chap. XV. ON THE DROSEEACEiE. 367 



elsewhere, and somewhat more rapid in a longitudinal 

 than in a transverse direction across the disc. These 

 plants exhibit still more plainly their inferiority to 

 animals in the absence of any reflex action, except in 

 so far as the glands of Drosera, when excited from a 

 distance, send back some influence which causes the 

 contents of the cells to become aggregated down to the 

 bases of the tentacles. But the greatest inferiority of 

 all is the absence of a central organ, able to receive 

 impressions from all points, to transmit their effects 

 in any definite direction, to store them up and repro- 

 duce them. 



