| General Morphology | 1 |
| The dermal skeleton | 1 |
| Teeth and dentition | 5 |
| | The morphology of the teeth | 5 |
| | Tooth histology | 10 |
| | The morphology of the dentition | 15 |
| Endoskeleton | 17 |
| Neurocranium | 17 |
| Visceral skeleton | 23 |
| Vertebral column | 27 |
| Girdles and paired fins | 27 |
| | Shoulder girdle | 27 |
| | Pectoral fin | 29 |
| | Pelvic girdle | 30 |
| | Pelvic fin | 30 |
| | Phyletic trends in the differentiation of the paired fins | 31 |
| | The question of the origin of the paired fins | 32 |
| Unpaired fins | 32 |
| | Dorsal fin(s) | 33 |
| | Anal fin | 33 |
| | Caudal fin | 33 |
| Sensory lines | 34 |
| Digestive system, muscles, kidneys, «ink sac» |
35 |
| Overall habitus (Gestalt) | 35 |
| Habitat and Adaptations | 36 |
| Relationships | 37 |
| Classification and Phylogeny | 39 |
| Systematics | 41 |
| Class Chondrichthyes | 41 |
| Subclass Subterbranchialia | 41 |
| | Superorder (unnamed) | 42 |
| | Order Iniopterygia | 42 |
| | Unnamed order | 45 |
| | Unnamed order | 45 |
| | Superorder Holocephali BONAPARTE 1832-41 | 46 |
| | Unnamed order | 46 |
| | Order Bradyodontida | 46 |
| | Incertae sedis | 46 |
| | Suborder Chimaerina nov. | 46 |
| Subclass Elasmobranchii BONAPARTE 1838 | 49 |
| | Order Euselachii HAY 1902 | 51 |
| | Superfamily Ctenacanthoidea nov. | 51 |
| | Superfamily Hybodontoidea nov. | 56 |
| | Superfamily Protacrodontoidea nov. | 61 |
| | Order Desmiodontida nov. | 62 |
| | Order Xenacanthida GLIKMAN 1964A | 63 |
| | Order Cladoselachida DEAN 1909C | 66 |
| | Order Coronodontida nov. | 68 |
| | Order Symmoriida nov. | 69 |
| | Order Eugeneodontida nov. | 74 |
| | Superfamily Caseodontoidea nov. | 79 |
| | Superfamily Edestoidea HAY 1930A | 85 |
| | Order Orodontida nov. | 90 |
| | Order Petalodontida nov. | 94 |
| | Order Squatinactida nov. | 101 |
| Presumed elasmobranch remains | 101 |
| | Isolated neurocrania. | 101 |
| | Isolated teeth, or parts of dentitions | 102 |
| | Mucous membrane denticles. | 103 |
| | Dermal denticles | 103 |
| | Ichthyodorulites (presumably belonging to elasmobranchs) | 104 |
| References and Bibliography | 107 |
| Abbreviations used in Figures | 111 |
| Index Generum | 112 |
| Index of higher Categories | 115 |
