Initially observes that The diversity of the breeds is something astonishing. Altogether at least a score of pigeons might be chosen, which if shown to an ornithologist, and he were told that they were wild birds, would certainly, I think, be ranked by him as well-defined species. All present pigeons must have either descended either from one type or at least 7 or 8 aboriginal forms. C. livia 3. Neither of these situation seem to be true.
Conclusion establishs that a variety of forms can come from a single form.
This great variety in domestic organisms arises from human selection of traits that have utility or esthetic value. Organisms in nature do not always fall into clearly marked species demarcations. I look at the term species, as one arbitrarily given for the sake of convenience to a set of individuals closely resembling each other, and that it does not essentially differ from the term variety, which is given to less distinct and more fluctuating forms. The term variety, again, in comparison with mere individual differences, is also applied arbitrarily, and for mere convenience sake. But by steps hereafter to be explained, the larger genera also tend to break up into smaller genera.