LIST OF ILLUSTRATIONS. 



FIG. PAGE 



1. Legs of Bird and Chick g 



2. Medusa, Tiaropsis Diadema 31 



3. Stauridium. Medusa, Cladonema Radiatum ... 43 



4. Spermatozoa 45 



5. Section of Larva of Calcareous Sponge 51 



6. Embryo of Hydrophilus Piceus 53 



7. Sessile Stage of Crinoid 56 



8. Larva of Crayfish . 56 



9. Graptolites 6g 



10. Trilobites remipes 70 



11. Palaeoniscus 72 



12. Larva of Echinoderm ig7 



13. Larva of Sea-Snail 200 



14. Stauridium. Cladonema 203 



15. Hydractinea carnea 204 



16. Larva of Parasitic Crustacea 207 



17. Axolotl .... 208 



18. Ambly stoma . 209 



19. Ammonites Humphresianus . . .... 214 



20. Ancyloceras . 216 



21. Section of Larva of Calcareous Sponge ... . 217 



22. Larva of Lancelet 251 



23. Larva of Ascidian 253 



24. FuU-grovfn Ascidian ... 255 



25. Impression of Tail of Archaeopteryx 266 



26. Skeletons of Feet : Anchitherium, Hipparioii, Horse . . 274 



