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Updated: May 19, 2025


This band is decorated with highly conventionalized feathers. It may be added that in this figure we have probably the most aberrant sun-symbol yet recognized, and on that account there is a possibility that the validity of my identification is more or less doubtful.

The development of the degraded, aberrant Arachnidan Pentastomum accords, in some important respects, with that of the intestinal worms. The Leptus-form larva of Julus, with its strange embryological development, in some respects so like that of some worms, points in that direction, as certainly as does the embryological development of the egg-parasite Ophioneurus.

It seemed impossible that anything so subtle and aberrant could be part of a system, the main features of which are regularity and precision. But the irregularity of mental phenomena is only in appearance. When we give up the individual, and take the mass, we find as much uniformity of result as in any other class of natural phenomena.

Each higher animal is composed of so many members and organs, of such diverse variations, that naturalists could never agree among themselves as to just where a balance of affinities between resemblances and differences should be struck; whether, for example, a given species varied so much from the type species of a genus say the genus Gothic house as to belong properly to an independent genus say Romanesque house; or whether, on the other hand, its divergencies were still so outweighed by its resemblances as to permit of its retention as an aberrant member of genus number one.

It prepares us to expect in the place among the mammalia, corresponding to that of the corvidae in the aves, a being or set of beings possessing a remarkable concentration of qualities from all the other groups of their order, but in general character as far above the corvidae as a typical group is above an aberrant one, the mammalia above the aves.

If a variation which approaches the nature of a monstrosity can strive thus forcibly to reproduce itself, it is not wonderful that less aberrant modifications should tend to be preserved even more strongly; and the history of the Ancon sheep is, in this respect, particularly instructive.

This aberrant artery anastomosed below the elbow-joint with the radial side of the radial artery. In each of these cases the right and left sides varied in precisely the same manner. Thirdly, as to pathology. Mr.

It has served as the norm to which consumption has tended to conform, and any appreciable departure from it is to be regarded as an aberrant form, sure to be eliminated sooner or later in the further course of development.

There is hence inferred a powerful argument against the limitation of families, which means a disproportionate increase amongst the aberrant members of the population. This argument really offers as good an example as can be desired of the almost unimaginable ease with which these skilful mathematicians allow themselves to be confused.

Thus the system of classification improved continually, although more and more intermediate forms, like archæopteryx, were discovered, and certain aberrant groups could find no permanent resting-place. But why should the generalized comprehensive forms stand at the bottom rather than the top of the systematic arrangement of their classes?

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