Elementary biology; an introduction to Elementary biology; an introduction to the science of life elementarybiolog00grue Year: 1924 492 ELEMENTARY BIOLOGY vertebrates known as mammals, because, like the mammals in general, the human species suckles its young and has a hairy outgrowth on the skin. And, of the ten or a dozen orders into which the class Mammalia is usually divided (see p. 486), the highest, or primates, seems best to agree with what we know of our own structure. In the matter of the limbs, all primates have the thigh quite free from the body, and the hand and foot have five dist
Elementary biology; an introduction to Elementary biology; an introduction to the science of life elementarybiolog00grue Year: 1924 492 ELEMENTARY BIOLOGY vertebrates known as mammals, because, like the mammals in general, the human species suckles its young and has a hairy outgrowth on the skin. And, of the ten or a dozen orders into which the class Mammalia is usually divided (see p. 486), the highest, or primates, seems best to agree with what we know of our own structure. In the matter of the limbs, all primates have the thigh quite free from the body, and the hand and foot have five distinct digits, with the first one (inner) usually opposable, thus con- stituting a grasping organ. The soles of the feet (or hands)
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