398 APPENDIX. 
worms (Turbellaria); 7. Sea-sacks (Tunicata); 8. Lancelet 
(Amphioxus); 9. Hag (Myxinoida); 10. Lamprey (Petro- 
myzontia); 11. Unknown forms of transition from single- 
nostriled animals to primeval fishes; 12. Silurian primeval 
fish (Onchus, etc.); 13. Living primeval fishes (sharks, rays, 
Chimere); 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. Primeval 
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 primeval 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 prime- 
val fishes and amphibia; 30. Enamelled heads (Ganocephala); 
31. Labyrinth toothed (Labyrinthodonta); 32. Blind burrowers 
(Cecilie); 83. Gilled amphibia (Sozobranchia); 34. Tailed 
amphibia (Sozura); 35. Frog amphibia (Anura); 386. 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. Primeval dragons (Simosauria); 43. Ser- 
pent dragons (Plesiosauria) ; 44. Fish dragons (Ichthyosauria) ; 
45. Teleosauria (Amphiccela) ; 46. Steneosauria (Opisthoccela) ; 
47. Alligators and Crocodiles (Prosthocela) ; 48. Carnivorous 
Dinosauria (Harpagosauria); 49. Herbivorous Dinosauria (‘Thero- 
sauria); 50. Meestricht lizards (Mosasauria); 51. Common primary 
form of Serpents (Ophidia); 52. Dog-toothed beaked lizards 
(Cynodontia); 53. Toothless beaked lizards (Cryptodontia) ; 
54. Long-tailed flying lizards (Rhamphorhynchi) ; 55. Short-tailed 
