LIST OF FIGURES IN TEXT 



NO. PAGE 



1. Tracks 35 



2. Footprints of Cheirotherium 39 



3. Portion of a slab of new red sandstone with tracks .... 44 



4. Portion of a slab with tracks 45 



5. Footprints from the Connecticut sandstone 48 



6. Pterygotus anglicus 51 



7. Silurian Merostomata 56 



8. Ichthyosaurus intermedius ' . 64 



9. Teeth of Ichthyosaurus platyodon 66 



10. Skull of Ichthyosaurus latifrons ....... 67 



11. Head of Ichthyosaurus platyodon 70 



12. Ichthyosaurus tenuirostris 70 



13. Mandibles of sea-lizards 78 



14. Plesiosaurus macrocephalus 80 



15. Magnified section of tooth of Labyrinthodon 89 



16. Skull of a Labyrinthodont, Mastodonsaurus Jcegeri .... 92 



17. Part of skeleton of a Labyrinthodont, Archegosaurus (Decheni) . . 95 



18. Skull of Archegosaurus 97 



19. Labyrinthodonts. 1, a, b, Cricotus. 2. Head of Eryops ... 98 



20. Skull of Eryops macrocephalus 99 



21. Skeleton of a Labyrinthodont, Actinodon 99 



22. A small Labyrinthodont, Ceraterpeton 100 



23. A snake-like Labyrinthodont, DoUchosoma 101 



