IV TABLE OF CONTENTS. 



PAGE 



CLASS 5. PISCES .... 79 



Sub-class I. ELASMOBRANCHII 81 



Order I. PEOSELACHII 84 



1C. ICHTHYOTOMI 84 



III. ACANTHODII 85 



,, TV. SELACHII 85 



Sub-order 1. TECTOSPONDYLI 86 



2. ASTEBOSPONDYLI 88 



Sub-class II. HOLOCEPHALI ,. 93 



Order I. CHIM^EOIDEI 93 



Sub-class III. DIPNOI ........ 94 



Order I. SIRENOIDEI ......... 94 



II. AETHEODIEA 96 



Sub-class IV. TELEOSTOMI . . . '.'... 97 



Order I. CEOSSOPTEBYGII 98 



II. ACTINOPTEEYGII 100 



Sub-order 1. CHONDEOSTEI 100 



2. PEOTOSPONDYLI 103 



3. AETHEOSPOKDYLI 107 



4. ISOSPONDYLI ....... 108 



,, 5. PLECTOSPONDYLI 112 



,, 6. NEMATOGNATHI . . . . . . 113 



7. HAPLOMI .113 



8. APODES 113 



9. ANACANTHINI . . . . . . . 114 



10. PERCESOCES . . ... . . 114 



11. PHAEYNGOGNATHI 114 



12. PEECOMOEPHI . 115 



13. LOPHOBBANCHII . . . . . . 120 



14. HEMIBEANCHII ...... 120 



15. PLECTOGNATHI . . . . . . 120 



