The Tongue.—The tongue may present morphological anomalies of great importance, since they are the cause of many defects of speech. Sometimes the tongue is too big—macroglossia, in which case it cannot move freely within the buccal cavity and even finds difficulty in remaining within the mouth, but projects between the lips, contributing in no small measure to giving the face an imbecile expression. At other times it is too small—microglossia.

A deficient or excessive development of the lingual frenulum may also interfere with the movements of the tongue (tongue-tie).

The Palate.—It is a frequent experience to meet with idiots having an ogival or gothic-arched palate, with the vault much curved and narrow, such as is met with in animals and similar in section to a gothic window. A special bony ridge or crest may also occur along the raphe or median line. Lastly, the palatine vault may be divided in two (cleft palate), a form frequently accompanied by a double uvula; this stigma may also be one of the causes of defective speech, so frequently met with in deficient children.

The palate normally presents a diversity of forms: Narrow and high, or broad and low—forms associated with the general type of head (dolichocephalic, high palate; brachycephalic, low palate) and especially with the type of face, as we have already seen in treating of the latter.

Importance of the Study of Morphology.—The study of morphology is of high importance in biology, and even more so in anthropology. And since the organism is a harmonic whole, in which the parts and their functions are closely interrelated, any external anomaly leads us to assume that there are corresponding anomalies of the internal organs, and hence, functional anomalies; hence also, in man, psychic anomalies. And conversely, if perfection of form has been attained, it leads us to assume that the entire organism is perfect in its internal organs as well, and in its complex physical and psychic functional action.

"Assure yourselves and one another," says Lelut in his Cadre de philosophie et de l'homme, "that wherever you see a change in the body, you will have to search for a corresponding change in the intelligence. Assure yourselves that you will have to establish this correlation throughout the entire scale, from the lowest degradations of imbecility to the highest achievement of genius, from the clearest and strongest mentality to that which is most profoundly and irremediably disordered."

This correlation between the morphological and the psychic personality must be sought throughout the entire scale of human variations, from the genius to the most degraded of imbeciles, from the strongest and most upright character to that which is most profoundly perturbed. Hence morphology constitutes a fundamental part in the study of human personality.

The principle of this aforesaid correlation was at first exemplified in the field of biological science only by abnormal persons, whose noticeable deviations from the customary limits, both in the external form of the body and in their psychic manifestations, gave proof of the phenomenon by exaggerating it. In his classic work, Traité des dégénérescences, Morel asserts that "the study of physical man cannot be isolated from the study of moral man." But in our own day, the theory has been marvellously illuminated and popularised by Cesare Lombroso, and precisely on its pathological side.

The Lombrosian theories were so rapidly popularised even before they were fully matured, that it seemed as though the spirit of the times was ripe to receive them, and had awakened to greet the new order of thought, after having long slumbered over the old; thus they wrought a revolution in the field of law and morality, and even laid a foundation for the erection of a new pedagogy.

Or to state it better, they again brought to light certain principles of truth that had been understood even from the most ancient times. For the principles proclaimed by Lombroso are in their general line certainly nothing new nor suddenly derived from a study of modern civilization; the belief that a physical stigma represents a moral stigma is exceedingly ancient. In the Bible we find Solomon saying: we may read the heart in the face. Homer describes the malignant Thyrsites as having a narrow forehead and ferret-like eyes. Caesar feared only those conspirators who were pale and lean. In the Middle Ages there was a law which held that in case of doubt as to which of two men was guilty, the uglier looking one should be hanged. And this same principle has been established from time immemorial in the current wisdom of the people, as is demonstrated by proverbs, which are like laws graven upon stone, and have been gathered experimentally through the repeated observation of successive generations. The proverbs tell us of the physical stigmata of the wicked: "Beware of those who bear the mark of God;" "The bristles prove the brute." Even in art, degenerative stigmata are introduced to represent the malevolent. The satyrs are represented as being of the microcephalic type. The devil was formerly represented as having goat's feet and a tail; Michelangelo pictures him with a narrow, receding forehead and pointed ears.