TAYLOR: DOMINANCV IN NATFRK. 
localities Desmidhiceit^ are the doininant forms of Planktonic life, and 
Diatoms are only represented by a few species, which are probably 
those least able to withstand the competition of their congeners, 
occupying the richer food watei s of the lowlands. 
The MYXOPHYCEiE or blue-green algai are also apparently very 
regressive and weak forms of life, being almost restricted in tliis 
country to very stagnant or foul waters, with deficient aeration and 
abundance of decaying organic matter, such waters being always 
characterized by a wealth of the very lowest forms of vegetation : 
the Myxophyceai are, howevei*, more plentiful in the loughs of 
Ireland where the competition is less seveie. 
It is Mankind, however, that affords evidence that probably appeals 
most forcibly to the ordinary individual and leads to agreement, or 
otherwise, with the principles involved by acceptance of Evolution, 
Dominancy, and the struggle for existence, for man is e([ually subject, 
in common with all life, to his environment, which powerfully aflects 
his mental and physical characteristics, and leads to the formation of 
racial or national peculiarities. 
In studying mankind we find a very full coidirmation of the truth 
of the laws here set forth : there is exactly the sanie area of chief 
evolutionary activity and dominancy : the same natural routes of 
dispersal, with the same distribution of the weaker and strongei" 
races over the globe, with a connected series of gradations leading 
from the most primitive and barbarous ti-ibes to the most recently 
evolved races of the highest intellectual and vital energy, exactly 
analogous to that seen in all other forms of life, with the same 
expansion of the highly endowed races, and the same expulsion or 
destruction of the lowest or inferior races : so that the striking 
coincidence and harmony existing between the distribution and the 
comparative capacities or dominancy of mankind are exactly 
paralleled by the distribution and relative superiority of organization 
exhibited in the mollusca and other life groups, and inevitably lead 
to the conclusion that man and all other organisms are governed 
and controlled by the same principles, and that the same explana- 
tion of the same phenomena must apply to all. 
The European or white race arose in Xorth-Central Europe, the 
region where its distinguishing characters are chiefly developed. 
It is the latest evolved and the most intellectual, advanced, and 
dominant of all mankind, gifted with the highest mental capacity, 
and is the present culminating point of evolutionary activity. 
Moreover, it is the only race which has spread, and is spreading 
far beyond the frontiers of its evolutionary region, and has seized 
immense tracts of land in all parts of the globe, expeUing, or 
destined to eventually expel, the aboriginal inhabitants therefrom. 
The remarkable dominating and dispersive power of the race is such, 
that even before the dawn of (Ireek History, and probably myriads 
