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The Origin of VertebratesWalter Holbrook Gaskell

The Origin of Vertebrates

by OpenStories

Original author: Walter Holbrook Gaskell

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"The Origin of Vertebrates" by Walter Holbrook Gaskell is a scientific publication written in the early 20th century. This work delves into the evolutionary history and anatomical characteristics of vertebrates, particularly examining their origins from invertebrate ancestors. Gaskell focuses on the central nervous system and various anatomical features that illustrate the evolutionary connection between vertebrates and their ancestral forms. The opening of the text presents an introduction where Gaskell reflects on the necessity of interdisciplinary approaches in scientific inquiry, specifically the interplay between physiology and comparative anatomy. He recounts the development of his own ideas, rooted in years of physiological research, which led him to explore the origins of vertebrates through various lines of evidence. Among these, he emphasizes the importance of studying the larval form of the lamprey, or Ammocoetes, as it provides crucial insights into the anatomical similarities shared with ancient vertebrates and the evolutionary transitions that have occurred over time.

The Origin of Vertebrates, by Walter Holbrook Gaskell. Republished by OpenStories from Project Gutenberg eBook #44000.

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36 Chapters

  1. 1.Chapter I: The Evidence of the Central Nervous System52 words
  2. 2.Chapter II: The Evidence of the Organs of Vision44 words
  3. 3.Chapter III: The Evidence of the Skeleton144 words
  4. 4.Chapter V: The Evidence of the Thyroid Gland70 words
  5. 5.Chapter VI: The Evidence of the Olfactory Apparatus63 words
  6. 6.Chapter VII: The Prosomatic Segments of Limulus and Its Allies38 words
  7. 7.Chapter VIII: The Segments Belonging to the Trigeminal Nerve-Group58 words
  8. 8.Chapter IX: The Prosomatic Segments of Ammocoetes51 words
  9. 9.Chapter X37 words
  10. 10.Chapter XI: The Evidence of the Auditory Apparatus and the Organs of the Lateral Line76 words
  11. 11.Chapter XII: The Region of the Spinal Cord102 words
  12. 12.Chapter XIII: The Notochord and Alimentary Canal69 words
  13. 13.Chapter XIV: The Principles of Embryology63 words
  14. 14.Chapter XV: Final Remarks (1)8,795 words
  15. 15.Chapter XV: Final Remarks (2)8,846 words
  16. 16.Chapter XV: Final Remarks (3)8,592 words
  17. 17.Chapter XV: Final Remarks (4)8,886 words
  18. 18.Chapter XV: Final Remarks (5)8,816 words
  1. 19.Chapter XV: Final Remarks (6)8,748 words
  2. 20.Chapter XV: Final Remarks (7)8,795 words
  3. 21.Chapter XV: Final Remarks (8)8,722 words
  4. 22.Chapter XV: Final Remarks (9)8,716 words
  5. 23.Chapter XV: Final Remarks (10)1,310 words
  6. 24.Chapter IV: , the respiratory muscles arose from the dorso-ventral muscles2,569 words
  7. 25.Chapter IV: , the probability of the theory that the trigeminal group of (1)8,741 words
  8. 26.Chapter IV: , the probability of the theory that the trigeminal group of (2)8,829 words
  9. 27.Chapter IV: , the probability of the theory that the trigeminal group of (3)8,601 words
  10. 28.Chapter IV: , the probability of the theory that the trigeminal group of (4)8,721 words
  11. 29.Chapter IV: , the probability of the theory that the trigeminal group of (5)8,755 words
  12. 30.Chapter IV: , the probability of the theory that the trigeminal group of (6)8,428 words
  13. 31.Chapter IV: , the probability of the theory that the trigeminal group of (7)8,818 words
  14. 32.Chapter IV: , the probability of the theory that the trigeminal group of (8)6,554 words
  15. 33.Conclusion7,779 words
  16. 34.Chapter XII: , which, according to Kowalewsky and others, give origin to the (1)8,805 words
  17. 35.Chapter XII: , which, according to Kowalewsky and others, give origin to the (2)7,517 words
  18. 36.Chapter XII: , which, according to Kowalewsky and others, give origin to the (3)4,393 words