142 Causes and Course of Organic Evolution 



such as the cognitic. For, in the cases of unisexual hybridity 

 cited (63: 273) as well as in many others that could be adduced, 

 structures that resulted only from definite local expenditures 

 of energy, by the placing there of definite molecules char- 

 acteristic of one parent, and which are absent in the other, 

 appeared of about half the size and number of those in the 

 former. 



Again, in cases of bisexual hybridity, two structures of diverse 

 morphological nature were both reproduced, though reduced 

 about half from those of two parents. Such is purely a molec- 

 ular expression of the activity of lines of energy-flow, that 

 here were reduced hereditarily by about one-half in intensity. 



Amongst unicellular animals, the need for recognition of 

 a cognitic energy is even more claimant than for most plants. 

 Thus the responsive streaming movements of an amoeba or 

 foraminifer, and the directive movements of a heliozoon, as 

 detailed in zoological literature, may be started by a chemic, 

 a lumic, a mechanic, an electric or other stimulus from TN-ith- 

 out. But the correlated streaming of the protoplasm, or 

 bending of the stiff pseudopodium when a food particle is 

 caught, represents a greatly more complex energized perception 

 on the part of the organism, that results in seizure, in absorption, 

 in digestion — the two latter largely biotic — and in assimilation, 

 that in their correlated or resultant interdependence proclaim an 

 adaptive distribution of lines of subtle energy-action and reaction. 



Amongst the Infusoria such displays of energy are greatly 

 more intensified, and a capacity is shown on the part of each 

 organism for "perceiving" several diverse stimuli in rapid 

 succession, for summating these into a resultant whole, and 

 rapidly thereafter for pursuing a line of motion or action that 

 is most satisfying to it for the time. All of this again represents 

 the incidence, it may be, of several stimuli, such as lumic and 

 gravic, the action of each of these on some special irritable 

 substance, the finking of such "perceptions" into a common 

 sensation, and the proenvironal arrangement of molecules by 

 energy expenditures, whose summated aggregation results in 

 proenvironal response. 



