Dogs

Domesticated in prehistoric times. Now 189 varieties, supposed to have descended from wild forms of which the JACKAL (or Coyote), the WOLF, GUARA. Dingo, and HUNTING Dog of S. Africa are examples (q.v.). Wild forms resemble the domestic forms of same locality and are fertile with them; 63 days gestation gestation in all. Wild forms howl and rarely bark, the hairle species of Mexico and S. America do not bark. Dogs do not sweat. Normally there are sectorial teeth, 6 in upper jaw, and 7 in lower, but these much reduced in the Japanese pug, which lacks also the incisors. Hairle dog of Egypt had only one molar. When dogs are eaten, they are fed a vegetable diet. Hair has distinct characteristics in each breed. The following races are supposed descended from distinct species, modified by cro ing: ESKIMO, GREYHOUND, HOUND, JAPANESE, MASTIFF, NEWFOUNDLAND, SHEPHERD, SPANIEL, TERRIER (q.v.). Dog Star. See SIRIUS.