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The Chain of Life in Geological Time: A Sketch of the Origin and Succession of Animals and PlantsDawson, John William, Sir

Science

The Chain of Life in Geological Time: A Sketch of the Origin and Succession of Animals and Plants

Name: The Chain of Life in Geological Time: A Sketch of the Origin and Succession of Animals and Plants
Author: Dawson, John William, Sir

Dawson, John William, Sir

Paleobotany; Paleontology

Structures of the oldest-known Angiospermous Exogen
      (_Syringoxylon mirabile_, Dn.)                                102

_Asterophyllites parvula_ (Dn.) and _Sphenophyllum
         antiquum_ (Dn.)                                            103

_Calamites_                                                   104

Carboniferous Ferns                                           105

Carboniferous Tree-ferns                                      107

_Lepidodendron corrugatum_ (Dn.)                              108

_Sigillariæ_ of the Carboniferous                            109

_Trigonocarpum Hookeri_ (Dn.)                                111

  _Frontispiece._ Pteraspis. Restored                               116

Siluro-Cambrian Conodonts                                    118

Lower Carboniferous Conodont                                 119

_a_, Head-shield of an Upper Silurian Fish (_Cyathaspis_);
         _b_, Spine of a Silurian Shark (_Onchus tenui-striatus_,
          Agass.); _c_, _d_, Scales of _Thecodus_                   121

_Cephalaspis Dawsoni_ (Lankester)                            122

Devonian Placoganoid Fishes (_Pterichthys cornutus_,
        _Cephalaspis Lyelli_)                                       123

Devonian Lepidoganoid Fishes (_Diplacanthus_ and
        _Osteolepis_)                                               124

Modern Dipnoi (_Ceratodus Fosteri_ and _Lepidosiren
         annectus_)                                                 124

Anterior part of the palate of _Dipterus_                    125

Dental plate of _Conchodus plicatus_ (Dn.)                   126

Dental plate of _Ceratodus Barrandii_                        126

Dental plate of _Ceratodus serratus_                         127

Jaws of _Dinichthys Hertzeri_ (Newberry)                     127

Lower Jaw of _Dinichthys Hertzeri_                           128

Jaws of _Lepidosiren_                                        128

A small Carboniferous Ganoid (_Palæoniscus_
         (_Rhadinichthys_) _Modulus_, Dn.)                          129

Teeth and Spines of Carboniferous Sharks                     130

Teeth of Cretaceous Sharks (_Otodus_ and _Ptychodus_)        131

Tooth of a Tertiary Shark (_Carcharodon_)                    132

A Liassic Ganoid (_Dapedius_)                                132

Cretaceous Fishes of the modern or Teleostian type
         (_Beryx Lewesiensis_ and _Portheus molossus_, Cope)        133

Modern Ganoids (_Polypterus_ and _Lepidosteus_)              134

  _Frontispiece._ A Microsaurian of the Carboniferous Period
     (_Hylonomus Lyelli_)                                           136

Wings of Devonian Insects                                    140

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The Chain of Life in Geological Time: A Sketch of the Origin and Succession of Animals and Plants

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