Gladwin is definite about the Australoids. They came over Bering Strait somewhere around 25,000 years ago, and drifted down the west coast. They spread out in the southwestern part of the United States below a line from San Francisco to the Texas coast, and flowed on down into Mexico and South America. For evidence he has more than the Australoid-Melanesian skulls of Lower California, Texas, Punin, Paltacalo, and Lagoa Santa. He cites a number of things used and made by the Australians of recent times and also found in the area between southern California and eastern Texas. They include an Aurignacian flint industry, bunt points for darts, bull-roarers, string made by spinning human hair, twisted rabbit fur, curved throwing sticks with parallel grooves, sand paintings, amputation of finger joints as shown in pictographs, and similarities in spear-throwers and darts with foreshafts (see illustration, page 228).[27] We should like to find them nearer Lagoa Santa. Gladwin’s next migration, the Proto-Negroid of Dixon, leans upon the Pseudo-Negroid traits of Hooton. It comes in about 17,000 years ago, also over Bering Strait, but down through the corridor between the retreating ice fields of western Canada. Having seen Aurignacian qualities in the Australoids, Gladwin sees Solutrean ones in the Negroid invaders. They bring—or, rather, make—the Folsom point. Unlike the Australoids, who were mostly food gatherers, the Negroids—or Folsom men—are primarily hunters. Although they come trickling in for many, many years, they are few; for, in spite of their hunting prowess and their fine flint knives and spear points, they never invade the Australoid territory that is staked out south from the Mexican border.[28] [Illustration: FROM THE OLD WORLD AND THE NEW _Implements from Australoid areas of the eastern hemisphere resembling implements from western Texas. (After Gladwin, 1937.)_] Bunt-Points A, Melanesia; B, western Texas. (length of B—6 inches) Bull-Roarers A, Australia; B, western Texas. (length of B—16 inches) Curved Throwing Sticks A, Australia; B, western Texas. (length of A—26 inches) Spear-Throwers A, Australia; B, western Texas, (length of B—24 inches) The next migration is the Algonquin. It reaches North America somewhere between 1000 and 500 B.C. These people bring in the cord-marked pottery of the Woodland culture of the eastern United States—unpolished and unpainted, its only ornament impressed in the clay. Such pottery has now been traced to western Canada, up into Alaska, across to Siberia, west through Russia to the beakerwares of Europe, and finally down into Africa about 3000 B.C. The Algonquins are such a mixture as the long trip of their pottery might indicate. They are generally long-headed, and they are not today wholly Mongoloid.[29] No Mongoloids till 300 B.C.