xvi CONTENTS 



PAGE 



Subclass i. Elasmobranchii 366 



Example of the Subclass Scyllium and Mustelus . . 366 



Subclass 2. Holocephali (omitted) 394 



Subclass 3. Teleostomi 394 



Example of the Subclass Salmofario .... 395 



Subclass 4. Dipnoi . . . 405 



Example of the Subclass Ceratodus fosteri . . . 405 



Class 3. Amphibia . . . . . . . 407 



Example of the Class Rana temporaries . . . 408 



Class 4. Reptilia 433 



Examples of the Class Lizards, turtles, crocodile . . 434 



Class 5. Aves 456 



Example of the Class Columba livia . . . -457 



Class 6. Mammalia 491 



Example of the Class Lepus cuniculus .... 491 



