vi CONTENTS 



PHYLUM CHORDATA continued. PAGE 



Class II. Pisces continued. 



Sub -class II. Holocephali . ...... 182 



Sub-class III. Teleostomi 190' 



1. Example of the Sub -class Salnio 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- 



todtis) 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 Lacurta 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. Archseornithes 405 



II. Neornithes . ... 407 





