The present population of Japan, according to E. Baelz, shows the following types. The first and most important is the Manchu-Korean type, characteristic of North China and Korea, and most frequent among the upper classes in Japan. The stature is conspicuously tall, the effect being heightened by slender and elegant figure. The face is long, with more or less oblique eyes but no marked prominence of the cheek-bones. The nose is aquiline, the chin slightly receding. With this type is associated a narrow chest, giving an air of elegance rather than of muscularity, an effect which is enhanced by the extremely delicate hands with long slender fingers. The second type is the Mongol, and presents a distinct contrast, with strong and squarely built figure, broad face, prominent cheek-bones, oblique eyes, flat nose and wide mouth. This type is not common in the Japanese Islands. The third type, more conspicuous than either of the preceding, is the Malay. The stature is small, with well-knit frame, and broad, well-developed chest. The face is generally round, the nose short, jaws and chin frequently projecting. None of these three types represents the aboriginal race of Japan, for there seems to be no doubt that the Ainu, who now survive in parts of the northern island of Yezo, occupied a greater area in earlier times and to them the prehistoric shell-mounds and other remains are usually attributed[659]. The Ainu are thickly and strongly built, but differ from all other Oriental types in the hairiness of face and body. The head is long, with a cephalic index of 77.8. Face and nose are broad, and the eyes are horizontal, not oblique, lacking the Mongolian fold. It is generally assumed that this population represents the easterly migration of that long-headed type which can be traced across the continents of Europe and Asia in the Stone Age, and that their entrance into the islands was effected at a time when the channel separating them from the mainland was neither so wide nor so deep as at the present time. Later Manchu-Korean invaders from the West, Mongols from the South, and Malays from the East pressed the aborigines further and further north, to Yezo, Sakhalin and the Kuriles. But it is possible that the Ainu were not the earliest inhabitants of Japan, for they themselves bear witness to predecessors, the _Koro-pok-guru_, mentioned above (p. 260). Neither is the assumption of kinship between the Ainu and prehistoric populations of Western Europe accepted without demur. Deniker, while acknowledging the resemblance to certain European types, classes the Ainu as a separate race, the _Palaeasiatics_. For while in head-length, prominent superciliary ridges, hairiness and the form of the nose they may be compared to Russians, Todas, and Australians, their skin colour, prominent cheek-bones, and other somatic features make any close affinity impossible[660].