Rivet[745] points out that from Brazil to Terra del Fuegia on the Atlantic slope, in Bolivia and Peru, on the high plateaux of the Andes, on the Pacific coast and perhaps in the south of California, traces of a distinct race are met with, sometimes in single individuals, sometimes in whole groups. This race of Lagoa Santa is an important primordial element in the population of South America, and has been termed by Deniker the Palaeo-American sub-race[746]. The men were of low stature but considerable strength, the skull was long, narrow and high, of moderate size, prognathous, with strong brow ridges, but not a retreating forehead. There is no reliable evidence as to the age of these remains. Hrdli[vc]ka, after reviewing all the evidence says, "Besides agreeing closely with the dolichocephalic American type, which had an extensive representation throughout Brazil, including the Province of Minas Geraes, and in many other parts of South America, it is the same type which is met with farther north among the Aztec, Tarasco, Otomi, Tarahumare, Pima, Californians, ancient Utah cliff dwellers, ancient north-eastern Pueblos, Shoshoni, many of the Plains Tribes, Iroquois, Eastern Siouan, and Algonquian. But it is apart from the Eskimo, who form a distinct subtype of the yellow-brown strain of humanity[747]." Rivet[748] adds that an examination of the present distribution of the descendants of the Lagoa-Santa type shows that they are all border peoples, in East Brazil, and the south of Patagonia and Terra del Fuegia, where the climate is rigorous, in desert islands of west and southern Chili, on the coast of Ecuador, and perhaps in California. This suggests that they have been driven out in a great eccentric movement from their old habitat, into new environment producing fresh crossings. There is an absence of this high narrow-headed type throughout the northern part of South America, and a prevalence of medium or sub-brachycephalic heads which are always low in the crown. These are now represented by the Caribs and Arawaks, but there was more than one migration of brachycephalic peoples from the north. To return to North America. As we have just seen Hrdli[vc]ka recognises a dolichocephalic element in North America, and various ethnic groups range to pronounced brachycephaly. Nevertheless he believes in the original unity of the Indian race in America, basing his conclusions on the colour of the skin, which ranges from yellowish white to dark brown, the straight black hair, scanty beard, hairless body, brown and often more or less slanting eye, mesorrhine nose, medium prognathism, skeletal proportions and other essential features. In all these characters the American Indians resemble the yellowish brown peoples of eastern Asia and a large part of Polynesia[749]. He also believes that there were many successive migrations from Asia.