vi CONTENTS 



PHYLUM CHORD ATA continued. PAGE 



Class II. Pisces continued. . 

 Sub-class II. Holocephali . 182 



Sub-class III. Teleostomi 190 



1. Example of the Sub-class Salmo fario 192 



2. Distinctive Characters and Classification 211 



Systematic Position of the Example 216 



3. General Organisation 217 



Sub-class IV. Dipnoi 239 



1. Example of the Class Ceratodus (Neoceratodus or Epicera- 



todus) forsteri 239 



2. Distinctive Characters and Classification 249 



3. General Remarks 250 



Appendix to Pisces Ostracodermi 253 



Class III. Amphibia 256 



1. Example of the Class Rana temporaria or Rana esculenta . .257 



2. Distinctv e Characters and Classification . . . . . 283 

 Systematic Position of the Example 285 



3. General Organisation 285 



Class IV. Eeptilia 303 



1. Example of the Class Lacerta . . . . 304 



2. Distinctive Characters and Classification 323 



Systematic Position of the Example 327 



3. General Organisation of Recent Reptilia 327 



4. Extinct Groups of Reptiles 360 



Class V. Aves .366 



1. Example of the Class Columba livia 367 



2. Distinctive Characters and Classification 395 



Systematic Position of the* Example 404 



3. General Organisation 405 



Sub-class I. Archaeornithes . 405 



II. Neornithes . 407 



