CONTENTS 



PAGE 



Subclass i. Elasmobranchii . • 3 6 ° 



Example of the Subclass — Scylluwi and Mustelus . . 366 



Subclass 2. Holocephali (omitted) . 394 



Subclass 3. Teleostomi . . . 394 



Example of the Subclass — Salmo fario ■ ■ 395 



Subclass 4. Dipnoi . • 4°5 



Example of the Subclass — Ceratodus fosteri 4°5 



Class 3. Amphibia . . ■ 4°7 



Example of the Class — Rana temporaria . . . 408 



Class 4. Reptilia . . . 433 



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



Class 5. Aves ... • 45 6 



Example of the Class — Columba livia . 457 



Class 6. Mammalia . . . • 49 ' 



Example of the Class — Lepus cuniculus . . . 491 



