Plainly, this second species of Man was subterranean.
The notion was so plausible that I at once accepted it, and went on to assume the how of this splitting of the human species.
The two species that had resulted from the evolution of man were sliding down towards, or had already arrived at, an altogether new relationship.
Then I thought of the Great Fear that was between the two species, and for the first time, with a sudden shiver, came the clear knowledge of what the meat I had seen might be.
But, gradually, the truth dawned on me: that Man had not remained one species, but had differentiated into two distinct animals: that my graceful children of the Upper-world were not the sole descendants of our generation, but that this bleached, obscene, nocturnal Thing, which had flashed before me, was also heir to all the ages.
And this same widening gulf—which is due to the length and expense of the higher educational process and the increased facilities for and temptations towards refined habits on the part of the rich—will make that exchange between class and class, that promotion by intermarriage which at present retards the splitting of our species along lines of social stratification, less and less frequent.
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It is an endangered species.
It is thought that there are over 20,000 species of ants.