LECTURE II. 



1. Introductory. 2. Extinction of Animals. 3. Law of Extinction. 4. Animals 

 extirpated by Human Agency. 5. Apteryx of New Zealand. 6. Moa of New 

 Zealand. 7. Dodo of the Mauritius. 8. Irish Elk. 9. Epoch of Terrestrial 

 Mammalia. 10. Fossil Mammalian Remains. 11. Comparative Anatomy. 12. 

 Osteology of the Carnivora. 13. Osteology of the Herbivora. 14. Dental organs 

 of the Rodentia. 15. General Inferences. 16. Fossil Elephants, &rc. 17. Fossil 

 Mammalia of the valley of the Thames. 18. Fossil Elephants of other parts of 

 England. 19. Extinct Elephant or Mammoth in Ice. 20. Mammoths of the 

 alluvial deposits of Russia. 21. Siberia and Russia in the Mammoth epoch. 

 22. Mastodon. 23. Mastodons of Ava. 24. Fossil Mammalia of the Sub- 

 Himalayahs. 25. Sub-Himalayan tertiary deposits. 26. Remarkable collocation 

 of Fossil animals. 27. The Pampas. 28. The Sloth tribe. 29. Megatherium. 

 30. Mylodon. 31. Megalonyx. 32. Glyptodon. 33. Toxodon. 34. Fossil 

 Hippopotamus, &c. 35. Dinotherium. 36. Fossil Carnivora in Caverns. 37. 

 Cave of Gaylenreuth. 38. Fbrstershbhle, or Forest-cave. 39. Bone Caverns in 

 England. 40. Diseased Bones found in Caverns. 41. Human Bones in Caverns. 

 42. Osseous Breccia. 43. The Rock of Gibraltar. 44. Osseous Breccia of Aus- 

 tralia. 45. Retrospect. 



1. Introductory. — In the previous Lecture we took a 

 comprehensive view of the actual physical condition of the 

 surface of our planet, and of the nature and effects of the 

 principal agents by which the land, is disintegrated and 

 renewed. We found in the modern fluviatile and marine 

 deposits, that the remains of man, of works of art, and of 

 existing species of animals and vegetables, were preserved. 

 In every step of our progress, the grand law of nature, 

 alternate decay and renovation, was exemplified in striking 

 characters. "Whether in the regions of eternal snow, or in 

 torrid climes — in the rocks and mountains, or in the verdant 

 plains — by the agency of heat, or by the effect of cold — of 

 drought, or of moisture — of steam, or of vapour — by the 

 abrasion of torrents and rivers — by inundations of the 

 ocean — or by volcanic eruptions — still the work of destruc- 



