viii CONTENTS. 



CHAPTER PAGE 



XIII, — Animal Motion - - - - - 188 



XIV. — Generation and Development - - 195 



XV. — Classification of Animals _ - . 208 



XVI. — Aristotle's Anaima, or Animals with- 

 out Blood 216 



XVII. — Aristotle's Enaima, or Animals with 



Blood 229 



XVIII. — Aristotle's Enaima, or Animals with 



Blood (continued) . . . . 250 



ILLUSTEATIVE DRAWINGS. 



Fig. 1. — Appearance op Eainbows, as seen at Athens. 



2. — Arrangement of the Colours of Eainbows, accord- 

 ing to Aristotle. 



3. — Aristotle's Compass. 



4. — Gradation from Inanimate Matter through Lower 

 TO Higher Forms of Life. 



5. — Aristotle's Elements and their Eelations. 

 6. — Left Astragalus of a Sheep. 

 7. — Bones from the Heart of a Three-year Old Ox. 

 8. — Heart and Blood-vessels, according to Aristotle. 

 9. — Egg opened after eight days' Incubation. 

 10. — Chick removed from Egg after ten days' Incuba- 

 tion. 



