1892.] > Conflict Between Organisms. 929 
by the development of colonies, buds, stolons or increased 
fertility. 
The numerical series representing the gradual diminution 
of the intensity of the struggle of animal organisms amongst 
themselves, passing from very active, free moving forms to 
sessile and concealed forms is: 60,000, 30,000, 400, 314-3, 0. 
These marked contrasts seem to be well founded and highly 
significant. They probably indicate that in a completed 
theory of organic evolution, the rate at which energy is dissi- 
pated in the form of motion by a given animal organism must 
by taken into account. The possible number of directions of 
motion and attack under different conditions, it is scarcely 
necessary to add, have here been calculated upon the basis 
afforded by modern geometry, from certain relations of the 
point and line. 
