4 
Review of Darwin’s Theory on the Origin of Species. 169 
Illustrations of this kind may be multiplied to a great extent. 
They make it plain that, whether species in nature are aborigi- 
nal and definite or not, our practical conclusions about them, as 
embodied in systematic works, are not facts but judgments, and 
largely fallible judgments. 
ow much of the actual coincidence of authorities is owing 
nd to one naturalist’s 
and we see beforehand how strikingly the actual geographical 
ther 
Weshould continue to regard the forms in question as distinct 
1 applying his principle of natural selection to the work in 
hand, My; . ‘Darvei F F 
of ani 
= a 8, the fact that naturalists do not practically agree, and 
i 
and what ar 
Most flou 
Closely but 4 
certain species,—just such clusters as would be formed if 
free their members once to have been satellites or varie- 
aw Central or parent species, but to have attained at length 
associat: lvergence and a specific character. The fact of such 
Of it ens tS Undeniable; and the use which Mr. Darwin m 
Seems fair and natural 
