File:Comparative zoology, structural and systematic - for use in schools and colleges (1883) (20677673251).jpg

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English:

Title: Comparative zoology, structural and systematic : for use in schools and colleges
Identifier: comparativezool00orto (find matches)
Year: 1883 (1880s)
Authors: Orton, James, 1830-1877; Birge, E. A. (Edward Asahel), 1851-1950
Subjects: Zoology; Anatomy, Comparative; Physiology, Comparative
Publisher: New York : Harper & Bros.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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Text Appearing Before Image:
210 COMPARATIVE ZOOLOGY. the Toad, the scales of Snakes, the feathers of Birds, and the hair of Mammals, may be termed a metamorphosis.
Text Appearing After Image:
Fig. 174.— Metamorphosis of the Newt. The change from milk-teeth to a permanent set is another example. An animal rises in organization as development ad- vances. Thus, a Caterpillar's life has nothing nobler about it than the ability to eat, while the Butterfly ex- pends the power garnered up by the larva in a gay and busy life. But there are seeming reversals of this law. Some mature animals appear lower in the scale than their young. The larval Cirripede has a pair of magnificent compound eyes and complex antennse; when, adult, the antennae are gone, and the eyes are reduced to a single, simple, minute eye-spot. So the germs of the sedentary Sponge and Oyster are free and active. The adult ani- mal, however, is always superior in alone possessing the power of reproduction. Such a process is known as retro- grade metamorphosis. There are certain larval forms so characteristic of the

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Flickr tags
  • bookid:comparativezool00orto
  • bookyear:1883
  • bookdecade:1880
  • bookcentury:1800
  • bookauthor:Orton_James_1830_1877
  • bookauthor:Birge_E_A_Edward_Asahel_1851_1950
  • booksubject:Zoology
  • booksubject:Anatomy_Comparative
  • booksubject:Physiology_Comparative
  • bookpublisher:New_York_Harper_Bros_
  • bookcontributor:Smithsonian_Libraries
  • booksponsor:Biodiversity_Heritage_Library
  • bookleafnumber:218
  • bookcollection:biodiversity
  • BHL Collection
  • BHL Consortium
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