Like every other function of our organism, our mental activity exhibits the phenomenon of development in two directions, individually in each human being and phyletically in the whole race.
In this case we were also concerned with the two different forms under which one and the same species appears, and of which it was shown to be probable that the one isphyletically older than the other.
It can hardly be objected if I regard the alternation of the summer and winter form in this case as a periodic reversion to the phyletically older (winter) form.
This form of caterpillar must therefore be regarded as phyletically the oldest, and this very well agrees with the character of the moth, which differs essentially from S.
Thus, it is conceivable à priori that reversion may occur by the action of an inciting cause having nothing to do with the origin of the phyletically older form.
These facts point to the conclusion that the Noctuæ as a whole are phyletically younger than the Geometræ, whilst the Genuinæ and Bombyciformes have further advanced in phyletic development than the Minores and Quadrifidæ.
This fact of the sterility is strongly opposed to the idea that these Amblystomas are the regular precursors of the phyletically advancing genus Siredon.
The black reticulation was added to the ground-colour as a new means of adaptation, this character appearing only in the phyletically younger brown form, and being entirely absent, or only faintly indicated, in the older green variety.
The spots which in Hippophaës are imitations of red berries, in species which have further advancedphyletically play quite another part--they serve as means of alarm, or signals of distastefulness.
Gorgoniades is obviously a phyletically older species, as we perceive from the marking and from the possession of a horn.
There can be no doubt that in all these cases the cycle of generations has been developed from phyletically similar generations.
Complete certainty would be given to this conclusion by a knowledge of the young forms of other phyletically retarded species, especially those of the American D.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "phyletically" in a variety of sentences. We hope that you will now be able to make sentences using this word.
