6 EVOLUTIONS OF ORGANIZATION. 
own appointed place and harmonies, while the 
central tower ascends to its pre-ordained comple- 
tion,—an evolution like that of a plant from whose 
root-leaves the shoot ascends with leaves that 
change their character according to law, till the 
summit is reached, where definite groups converge, 
assorted to complete the flower. 
And just as there are diverse notions as to the 
character of the evolutions of life on the globe, so 
there is difference of opinion as to the source from 
which it springs. There are some who still deny 
the genetic connection of different forms of life, 
and others who either consider genetic connection 
proved, or look on it as a hypothesis with more or 
less probability in its favour; and among these 
latter there are some who see no morphological 
facts which cannot be explained by reference to 
genetic relationship and its involved lines of 
heredity; while there are others like myself who, 
in heredity, can only recognize a phenomenon the 
origin of which demands an explanation. 
It is a very remarkable circumstance that while 
all these views are held and have been known to 
the scientific world for a great length of time, the 
name of Evolutionists has, with curious oblivious- 
ness, been assumed as a distinctive title by those 
who believe that the evolution is merely indefinite 
