Alienists have noted certain characters which very frequently, though not constantly, accompany these fatal degenerations. Such are, on the moral side, apathy, loss of moral sense, frequent tendencies to impulsiveness or doubt, psychical inequalities owing to the excess of some faculty (memory, æsthetic taste, &c.) or defect of other qualities (calculation, for example), exaggerated mutism or verbosity, morbid vanity, excessive originality, and excessive pre-occupation with self, the tendency to put mystical interpretations on the simplest facts, the abuse of symbolism and of special words which are used as an almost exclusive mode of expression. Such, on the physical side, are prominent ears, deficiency of beard, irregularity of teeth, excessive asymmetry of face and head, which may be very large or very small, sexual precocity, smallness or disproportion of the body, lefthandedness, stammering, rickets, phthisis, excessive fecundity, neutralized afterwards by abortions or complete sterility, with constant aggravation of abnormalities in the children.[11] Without doubt many alienists have here fallen into exaggerations, especially when they have sought to deduce degeneration from a single fact. But, taken on the whole, the theory is irrefutable; every day brings fresh applications and confirmations. Among the most curious are those supplied by recent studies on genius. The signs of degeneration in men of genius they show are sometimes more numerous than in the insane. Let us examine them. _Height._--First of all it is necessary to remark the frequency of physical signs of degeneration, only masqued by the vivacity of the countenance and the prestige of reputation, which distracts us from giving them due importance. The simplest of these, which struck our ancestors and has passed into a proverb, is the smallness of the body.