292 



APPENDIX 



Phylum 

 Chordata 



Sub- phylum 

 { Adelochorda . . 

 Urochorda. . 



Class 



Vertebrata 



Acrania 

 Cyclostomata 

 * Pisces 

 (fishes) 



1 Amphibia 

 1 Reptilia 



'Aves 

 (birds) 



1 Mammalia 



Balanoglossus, etc. — worm-like chordates 

 Ascidians, salps, etc. — sessile and secon- 

 darily free-swimming marine chordates, 



162, 168 



Amphioxus (lancelets) 162 



Lampreys, hags 168 



Ostracodermata (Palaeozoic shelly-skinned 



fishes) i6*i, 165-168 



Arthrodira (Palteozoic joint-necked fishes) 



166-168 

 Elasmobranchii — sharks, rays, chimaeroids 



161, 167-169 



Dipnoi (lung-fishes) 168, 170, 172 



Teleostomi 173 



lobe-finned ganoids (Crossopterygii) 



168, 172, 174 

 true ganoids — sturgeons, garpike, 



bowfins, etc 168, 1 70 



teleosts (bony fishes) 168, 170, 175 



Frogs, toads, newts, mud-puppies, Stego- 

 cephalia, etc 177-183 



Turtles, tortoises, tuateras, lizards, mosa- 

 saurs, snakes, crocodilians, dinosaurs, 

 mammal-like reptiles, ichthyosaurs, ple- 

 siosaurs, pterosaurs (flying reptiles), etc. 



184-226 



f Reptile-like birds (Archcropteryx) 226-229 



\ Modernized birds 227-231 



"Ratite" birds — ostriches, moas, etc. 



228, 229 

 "Carinate" birds — toothed birds and 

 all other birds 230, 23 1 



Monotremes (egg-laying mammals) — 

 duck-bills, etc 235, 273 



1 Marsupials (pouched mammals) — opos- 

 sums, kangaroos, etc 235, 237, 243, 244 

 Placentals 



insectivores, carnivores, primates, ro- 

 dents, bats, whales, artiodactyls (cattle, 

 deer, pigs, antelopes, giraffes, camels, 

 hippopotami, etc.), ungulates including 

 proboscidea (mastodons and elephants) 

 and perissodactyls (horses, tapirs, rhi- 

 noceroses, titanotheres, etc.), and many 



other orders 259-274 



' Fossil and recent forms. 

 All other classes listed are as yet unknown in the fossil state. 



