156 Review of Darwin’s Theory on the Origin of Species. 
in perhaps as many individuals as it numbered at any subs- 
quent period. ‘ 
r. Darwin, on the other hand, holds the orthodox viewof 
the descent of all the individuals of a species not only froma 
local birth-place, but from a single ancestor or pair; and thi — 
each species has extended and established itself, through natural 
agencies, wherever it could; so that the actual geographical 
distribution of any species is by no means a primordial arrange 
ment, but a natural result. He goes farther, and this volumes 
a protracted argument intended to prove that the species we 
recognize have not been independently created, as such, but 
have descended, like varieties, from other species. Vari é 
on this view, are incipient or possible species: species are varie 
.The theory of Agassiz, referring as it does the phenoment 
both of origin and distribution directly to the Divine will,—thus 
Darwin's aim and processes are strictly scientific, and his 
deavor, whether successful or futile, must be regarded as a legit 
imate attempt to extend the domain of natural or physical 
no physieal or second cause,” yet this can be prov 
this respect, it is certain that plants and animals are subject 
from their birth to physical ae. to which they have i? 
accommodate themselves as they can. How literally they ) 
riace. Mr, vin thinks that, acting upon 42”. so 
tion to vary, they have sufiiced even to MOO™ 
