Jelly-Fish, Star-Fish, and Sea-Urchins

About this eBook

Author

Romanes, George John, 1848-1894

Title

Jelly-Fish, Star-Fish, and Sea-Urchins: Being a Research on Primitive Nervous Systems

Credits

Produced by Charlene Taylor, David Garcia, Gerard Arthus, Mary Akers and the Online Distributed Proofreading Team at www.pgdp.net (This book was produced from scanned images of public domain material from the Google Print project.)

Language

English

LoC Class

QL: Science: Zoology

Subject

Sea urchins

Category

Text

eBook-No.

46607

Project Gutenberg

https://www.gutenberg.org/ebooks/46607

Release Date

August 17, 2014

Copyright

Public domain in the USA.

Contents

1. 1.JELLY-FISH, STAR-FISH AND SEA-URCHINS
2. 2.PREFACE.
3. 3.CONTENTS.
4. 4.INTRODUCTION.
5. 5.CHAPTER I. STRUCTURE OF THE MEDUSÆ.
6. 6.CHAPTER II. FUNDAMENTAL EXPERIMENTS. — Effects of excising the entire Margins of Nectocalyces. — Effects of excising the entire Margins of Umbrellas. — Effects of excising Certain Portions of the Margins of Nectocalyces. — Effects of excising Certain Portions of the Margin of Umbrellas. — Effects upon the Manubrium of excising the Margin of a Nectocalyx or Umbrella. — Summary of Chapter.
7. 7.CHAPTER III. EXPERIMENTS IN STIMULATION. — Mechanical, Chemical, and Thermal Stimulation. — Luminous Stimulation. — Electrical Stimulation. — Period of Latency, and Summation of Stimuli. — Effects of Temperature on Excitability.
8. 8.CHAPTER IV. EXPERIMENTS IN SECTION OF COVERED-EYED MEDUSÆ. — Rate of Transmission of Stimuli. — Stimulus-waves. — Exhaustion. — Ganglia appearing to assert their Influence at a Distance from their own Seat. — Regeneration of Tissues.
9. 9.CHAPTER V. EXPERIMENTS IN SECTION OF NAKED-EYED MEDUSÆ. — Distribution of Nerves in Sarsia. — Distribution of Nerves in Tiaropsis Indicans. — Staurophora Laciniata.
10. 10.CHAPTER VI. CO-ORDINATION. — Covered-eyed Medusæ. — Naked-eyed Medusæ.
11. 11.CHAPTER VII. NATURAL RHYTHM. — Effects of Segmentation on the Rhythm. — Effects of Other Forms of Mutilation on the Rhythm. — Effects of lessening the Amount of Tissue adhering to a Single Ganglion. — Effects of Temperature on the Rhythm. — Effects of Freezing Medusæ. — Effects of Certain Gases on the Rhythm.
12. 12.CHAPTER VIII. ARTIFICIAL RHYTHM.
13. 13.CHAPTER IX. POISONS. — Remarks. — Physiological Effects of Fresh Water on the Medusæ — The Fresh-water Medusa.
14. 14.CHAPTER X. STAR-FISH AND SEA-URCHINS. — Structure of Star-fish and Sea-Urchins. — Modifications of the Star-fish Type. — Natural Movements. — Stimulation. — Section. — Special Senses.
15. 15.FOOTNOTES:

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