File:Four-footed Americans and their kin (1898) (14758573636).jpg

Identifier: fourfootedamericwrig (find matches)
Title: Four-footed Americans and their kin
Year: 1898 (1890s)
Authors: Wright, Mabel Osgood, 1859-1934 Chapman, Frank M. (Frank Michler), 1864-1945, ed Seton, Ernest Thompson, 1860-1946, ill
Subjects: Mammals Animal behavior
Publisher: New York : Macmillan
Contributing Library: Information and Library Science Library, University of North Carolina at Chapel Hill
Digitizing Sponsor: University of North Carolina at Chapel Hill

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oup contain the Insects,with many legs, their bodies being divided into threeparts. Insects go through many changes in the courseof development. Take the butterfly as an example.First an egg is laid by a fully grown butterfly ; second,a caterpillar is hatched from the egg; third, the cater-pillar spins itself into a chrysalis, or cocoon, out ofwhich comes the winged butterfly. Ants, mosquitoes,flies, and beetles are all insects. Among the next circle of branches we find the ani-mals having backbones, the Vertebrates. I think youwill feel more at home with them, and we are morenearly concerned with them now, as our mammals be-long in this order, although there are many things youmust some day learn of the many backboneless twigs,especially about the insects with their wonderful wingsand stings. I suppose my Rattlesnake is a rather low-down Ver-tebrate, Uncle Roy, said Nat. No, my boy, there are two grades below him andtwo above. See, — and the Doctor drew a branchwith five divisions.
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Vertebrate Branches of the Animal Tree.37 38 FOUR-FOOTED AMERICANS THE VERTEBRATE BRANCHES OF THE ANIMALTREE ANIMALS HAVING BACKBONES Animals with bony skeletons; never having more than twopairs of limbs. These animals inhabit both land and water, andmay either swim, fly, crawl, or walk. Fishes .... Cold-blooded animals that live in water; usuallycovered with scales. They breathe through gills,and in their fins we see the very beginnings oflimbs. Frogs, etc. . . (Amphibians.) Going through several transforma-tions, from egg to perfect animal, but having legswhen fully grown. The stepping-stones betweenfishes and reptiles. Reptiles . . . Cold-blooded, egg-laying animals, either with a shellor scaly covering, living on land or in the water;some kinds doing both. They have simple, three-chambered hearts. Alligators, Turtles, and Snakesare Reptiles. Birds Warm-blooded, air-breathing animals. They are covered with feathers, have four-chambered hearts,and the young are hatched from eggs. Ma

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