Our American pronghorn "antelope" is not far removed in its structure from our white mountain goat. It foreshadows the sheathed-horned ruminants, but differs from all of them in the fact that its horns bear a prong, and also in that they are periodically shed and renewed. This beautiful and graceful little animal, truly antelopelike in form and habit, stands about three feet high at the shoulder, has slender legs and feet, with no false hoofs, and is exceedingly swift in its bounding gait. It is now almost gone from the wide plains where only a few years ago it was to be seen in summer from the Saskatchewan to the Rio Grande and southward. In the autumn it would gather in the North into ever-increasing herds that swept southward to pass the winter in Texas and New Mexico, and then would  return northward with the advance of spring. The extension of fenced ranching, but most of all the spanning of the plains by railroads, rapidly put an end to these migrations, and the wasteful killing of the pronghorns in sport, or as food, completed the virtual extermination of one of the most interesting and desirable animals of the New World.