INDEX 



Page 



Page 



Acanthoclema ohioensis 79 



Acanthonema newberryi *87 



Acanthopecten *114 



Acleistoceras *90 



Aclisina *1 17 



Agelacrinites cincinnatiensis 54 



Agnatha 41 



Alethopteris *106 



Algae 29 



Allorisma *102 



Allorisma terminale *115 



Ammonoidea 38 



Amnicola *129 



Amphibia, general 42 



Permian 121 



Pleistocene 134 



Amphicoelia costata *66 



Amphicyrtoceras pettiti 69, *70 



Amphineura . 36 



Amplexus 59 



Anastrophia internascens 65 



Anchiopsis anchiops *92 



Angiospermophyta 32 



Anguispira *131 



Animal Kingdom 32 



Animals, classification 32 



Annelida, general 38 



Devonian 91 



Ordovician 53 



Permian 121 



Annularia 120 



Anodonta *124 



Anomalodonta gigantea 51 



Anthozoa, general 35 



Devonian ... 75 



Mississippian 97 



Ordovician 45 



Pe nnsyl vanian . 107 



Silurian 57 



Anthracopupa (?) dunkardana *121 



Aperture, of gastropods 37 



Aplexa *131 



Arachnoidea, general 39 



Ordovician 53 



Silurian 70 



Arachnophyllum *59 



Araucarians 32 



Arthroacantha carpenteri *94 



Arthrophyta 31 



Arthropoda, general 39 



Aspidopora newberryi 47 



* Indicates page on which form is illnstrated. 



Astartella *115 



Athyris 81 



Athyris lamellosa *99 



Atrypa reticularis 66, 82, *83 



Aulacophyllum *78 



Aulopora expatiata *76 



Aves, general 43 



Aviculopecten *84, *1 14 



Aviculopecten winchelli *102 



Aviculopinna americana *114 



Avonia *99 



B 



Bactrites arkonensis *90 



Bascomella gigantea *109 



Basic references 6 



Batostoma jamesi *47 



Beak, of brachiopods 36 



Beak, of pelecypods 37 



Bellerophon 87, *1 17 



Bellerophon newberryi 87 



Bembexia adjutor *87 



Birds 134 



Blastoidea, Devonian 93 



Books for further study 



Devonian 94 



Mississippian 104 



Ordovician 55 



Pennsylvanian 119 



Permian 121 



Pleistocene 136 



Silurian 73 



Brachiopoda, general 36 



Devonian 80 



Mississippian 



Ordovician 48 



Pennsylvanian 109 



Permian 120 



Silurian 62 



Brachymetopus rusticus *104 



Brachyprion 65 



Bryophyta 30 



Bryozoa, general 36 



Devonian 78 



Mississippian 97 



Ordovician 46 



Pennsylvanian 107 



Silurian 60 



Bulimnea megasoma *130 



145 



