The book in which Lombroso instituted this comparison, “L’ uomo bianco e l’ Uomo di colore,” was published in 1871 by Sacchetto of Padua, after the manuscript had spent three years in vain wanderings from publisher to publisher. In this work the writer asserted the common descent of the higher apes and of the human species from an unknown primate, supporting his contention by means of anthropological data. Darwin’s “Descent of Man” was published while Lombroso’s work was in the press. The latter displays the remarkable knowledge of comparative anatomy which Lombroso owed to his teacher Panizza. It displays also a wide knowledge of ethnological literature, and a thorough acquaintanceship with the previous discoveries regarding prehistoric man (including those made at Cro-Magnon, Hohlenfels, etc., during the years 1868–1870); and it shows, in addition, the author’s remarkable talent for the discovery and utilization of fruitful analogies. I do not propose to consider here the various anomalies and malformations of the skull discovered, described, and enumerated by Lombroso and his pupils; but on account of their importance in relation to the criminal physiognomy, we may mention that an abnormal widening of the face (due to an exceptionally great distance between the two zygomatic arches), and an abnormal divergence of the two halves of the inferior maxillary bone, are characteristic of the criminal type. Subsequently to the first publication of Lombroso’s results the question of the distance between the angles of the lower jaw was thoroughly investigated, more especially by the Dutch anthropologists and alienists, at the instigation of Winkler of Amsterdam, and with the aid of a very large quantity of material.[11] Many remarkable peculiarities in the shape of the skull, the origin of which cannot be referred to the above-mentioned antagonism between the development of the cranium and that of the facial portion of the skull, depend upon abnormalities and disturbances in the sequence and extent of the ossification of the sutures of the skull. We know that the flat bones of the skull-cap grow principally at the edges, with which they come into contact one with another, and that normally they continue to grow in this way as long as growth continues in the subjacent portions of the brain; but if such a suture undergoes premature ossification, room can only be provided for the growth of the brain by the yielding of one or more of the other sutures, whereby that diameter of the skull at right angles to the yielding suture becomes increased. Thus a skull in which the sagittal or interparietal suture has undergone premature ossification (as often occurs in the Eskimo) assumes the shape of a narrow boat (scaphocephaly).