# Half Hours With the Lower Animals

An audiobook by Charles Holder, read by LibriVox volunteers (5 h 8 min, English).

This book is devoted to the study of invertebrate animals. While most people associate the word "animal" with fish, amphibians, reptiles, birds, and mammals, 90% of the animal species on earth are invertebrates, i.e., they have no backbone. Protozoans and invertebrate animals are found world-wide, from the bottom of the oceans to the the rain forests, ice caves, and our own back yards. Many invertebrates still reside in the oceans, while others dwell in our houses, back yards and gardens, in ponds and streams, and on the menus in seafood restaurants. Holders's book represents a traversal of several dozen familiar and not-so-familiar animals without backbones whose ancestors date back to the Cambrian period 500 million years ago. (Summary by Jefferey Smith)

[Listen](https://invisiblenetwork.ai/books/librivox/12153)
[Read the book](https://invisiblenetwork.ai/books/gutenberg/52085/read)

## Chapters

0. Preface (4:12): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_00_holder_64kb.mp3
1. Inhabitants of a Drop of Water (15:10): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_01_holder_64kb.mp3
2. The Sponges (10:49): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_02_holder_64kb.mp3
3. The Jellyfishes (18:43): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_03_holder_64kb.mp3
4. The Sea Anemones (11:24): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_04_holder_64kb.mp3
5. The Corals (14:22): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_05_holder_64kb.mp3
6. The Stone Lilies (4:43): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_06_holder_64kb.mp3
7. The Stars of the Sea (4:24): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_07_holder_64kb.mp3
8. Ocean Hedgehogs (4:49): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_08_holder_64kb.mp3
9. The Sea Cucumber (4:48): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_09_holder_64kb.mp3
10. The Worms (20:18): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_10_holder_64kb.mp3
11. The Two-Valved Shells (23:06): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_11_holder_64kb.mp3
12. The Univalves (21:26): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_12_holder_64kb.mp3
13. The Cuttlefishes (19:12): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_13_holder_64kb.mp3
14. The Crustaceans (4:37): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_14_holder_64kb.mp3
15. From Barnacles to Lobsters (9:40): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_15_holder_64kb.mp3
16. The Crabs (12:47): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_16_holder_64kb.mp3
17. Luminous Crabs (4:20): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_17_holder_64kb.mp3
18. The Insects (5:36): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_18_holder_64kb.mp3
19. Lower Forms of Insects (5:23): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_19_holder_64kb.mp3
20. The Spiders (16:13): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_20_holder_64kb.mp3
21. Some Six-Legged Insects (11:56): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_21_holder_64kb.mp3
22. Some Mimics (7:38): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_22_holder_64kb.mp3
23. The Grasshoppers and Locusts (10:21): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_23_holder_64kb.mp3
24. The Beetles (6:26): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_24_holder_64kb.mp3
25. The Bugs (7:24): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_25_holder_64kb.mp3
26. Flies and Mosquitoes (9:42): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_26_holder_64kb.mp3
27. The Butterflies and Moths (7:12): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_27_holder_64kb.mp3
28. The Ants (5:37): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_28_holder_64kb.mp3
29. The Bees and Wasps (6:02): https://archive.org/download/half_hours_lower_animals_1708_librivox/halfhoursloweranimals_29_holder_64kb.mp3