vi CONTENTS 



PHYLUM CHORDATA Continued. 

 Class II. Pisces Continued. 



PAOB 



Sub-class III. Teleostomi 183 



1. Example of the Class Salmo fario 183 



2. Distinctive Characters and Classification 201 



Systematic Position of the Example 207 



3. General Organisation . . . . . ' 209 



Sub-class IV. Dipnoi 229 



1. Example of the Class Ceratodus forsteri . . . . . 230 



2. Distinctive Characters and Classification 239 



3. General Remarks 240 



Appendix to Pisces The Ostracodermi . . . . . . 243 



Class III. Amphibia 245 



1. Example of the Class Eana temporaries 245 



2. Distinctive Characters and Classification 271 



Systematic Position of the Example . . . . . . 273 



3. General Organisation . . 273 



Class IV. Reptilia . . 291 



1. Example of the Class Lacerta 292 



2. Distinctive Characters and Classification . . . - . .311 

 Systematic Position of the Example 315 



3. General Organisation of Recent Reptilia 315 



4. Extinct Groups of Reptiles 344 



Class V. Aves .350 



1. Example of the Class Columba lima 351 



2. Distinctive Characters and Classification . . . . . . 380 

 Systematic Position of the Example 389 



3. General Organisation 389 



Sub-class I. Archseornithes . . . . . . . . 390 



,, II. Neornithes 392 



Class VI. Mammalia . v . . . .417 



1. Example of the Class Lepus cunicidus 417 



2. Distinctive Characters and Classification 447 



Systematic Position of the Example 460 



3. General Organisation 460 



The Mutual Relationships of the Chordata 575 



The Mutual Relationships of the Phyla of Animals 580 



