398 APPENDIX. 



worms (Turbellaria) ; 7. Sea-sacks (Tunicata) ; 8. Lancelet 

 (AmpHoxus) ; 9. Hag (Myxinoida) ; 10. Laraprey (Petro- 

 myzontia) ; 11. Unknown forms of transition from single- 

 nostriled animals to primaeval fishes ; 12. Silurian primaeval 

 fish (Onchus, etc.) ; 13. Living primaeval fishes (sharks, rays, 

 Chimaerae) ; 14. Most ancient (Silurian) enamelled fishes 

 (Pteraspis) ; 15. Turtle fishes (Pamphracti) ; 16. Sturgeons 

 (Sturiones) ; 17. Angular-scaled enamelled fishes (Rhom- 

 biferi) ; 18. Bony pike (Lepidosteus) ; 19. Finny pike (Polyp- 

 terus) ; 20. Hollow-boned fishes (Coeloscolopes) ; 21. Solid boned 

 fishes (Pycnoscolopes) ; 22. Bald pike (Amia) ; 23. Primaeval 

 boned fishes (Thrissopida) ; 24. Bony fishes with air passage 

 to the swimming bladder (Physostomi) ; 25. Bony fishes with- 

 out air passage to the swimming bladder (Physoclisti) ; 26. 

 Unknown forms of transition between primaeval fishes and 

 amphibious fishes; 27. Ceratodus ; 27a. Extinct Ceratodus from 

 the Trias; 27b. Living Australian Ceratodus; 28. African 

 amphibious fishes (Protopterus) and American amphibious fishes 

 (Lepidosiren) ; 29. Unknown forms of transition between primae- 

 val fishes and amphibia ; 30. Enamelled heads (Ganocephala) ; 

 31. Labyrinth toothed (Labyrinthodonta) ; 32. Blind burrowers 

 (Caeciliae) ; 33. Gilled amphibia (Sozobranchia) ; 34. Tailed 

 amphibia (Sozura); 35. Frog amphibia (Anura) ; 36. Dich- 

 thacantha (Proterosaurus) ; 37. Unknown forms of transition 

 between Amphibia and Protamnia; 38. Protamnia (common 

 primary form of all Amnion animals) ; 39. Primary mam- 

 mals (Promammalia) ; 40. Primeval reptiles (Proreptilia) ; 41. 

 (Thecodontia) ; 42. Primaeval dragons (Simosauria) ; 43. Ser- 

 pent dragons (Plesiosauria) ; 44. Fish dragons (Ichthyosauria) ; 

 45. Teleosauria (Amphiccela) ; 46. Steneosauria (Opisthocoela) ; 

 47. Alligators and Crocodiles (Prosthocoela) ; 48. Carnivorous 

 Dinosauria (Harpagosauria) ; 49. Herbivorous Dinosauria (Thero- 

 sauria); 50. Mffistricht lizards (Mosasauria) ; 51. Common primary 

 form of Serpents (Ophidia) ; 52. Dog-toothed beaked lizards 

 (Cynodontia) ; 53. Toothless beaked lizards (Cryptodontia) ; 

 54. Long-taUed flying lizards (Rhamphorhynchi) ; 55. Short- tailed 



