CONTENTS 



CLASS I. PISCES . 



Sub-Class 1. Selachii 



Order 1. Pleuropterygii 



2. acanthodii 



3. ichthyotomi 

 1. Plagiostomi 

 5. holocephali 



11 



11 



11 



Sub-Class 2. Ostracodermi 

 Ordek 1. Hetero.stracj 



2. axaspida 



3. aspidocephali 



4. Antiarcha 



11 



5) 



11 



Sub- Class 3. Arthrodira 



Sub-Class 4. Dipnoi 



Order 1. Ctenodipterini 



„ 2. SlRENOIDEI 



Sub-Class 5. Ganoidei . 



Order 1. Crossopterygii 

 „ 2. Chondrostei 



3. Heterocerci 



4. Lepidostei 



5. Amioidei 



>> 



ii 



ii 



Sub-Class 6. Teleostei . 



Order 1 . Physostomi 

 „ 2. Physoclysti 



CLASS II. AMPHIBIA 



Order 1. Stegocephalia 



2. Gymnophiona 



3. Urodela 



4. Anura . 



ii 



ii 

 ii 



PAGE 



2 



17 

 19 

 20 

 22 

 25 

 44 



50 



50 

 53 



54 

 56 



58 



61 

 61 



64 



65 



69 

 73 

 75 

 79 

 89 



92 



93 



101 



114 



117 

 135 

 135 

 137 



