148 



OHIO FOSSILS 



H 



Hadrophyllum d'orbignyi *77 



Hallopora elegantula *61 



Hallopora oneilli *47 



Hallopora ramosa *47 



Hallopora rugosa *47 



Halysites catenularia 58, *59 



Halysites labyiinthica 58 



Haplotrema concavum *131 



Hebertella insculpta 50 



Hebertella occidentalis , *50 



Hebertella sinuata 50 



Hederella canadensis *79 



Height, of pelecypod 37 



Helicodiscus parallelus *132 



Heliolites *59 



Heliophyllum 59 



Heliophyllum halli *78 



Heliophyllum proliferum 78 



Helisoma anceps *130 



Helisoma campanulatum *130 



Helisoma trivolvis *130 



Helix *131 



Helopora inexspectata 79 



Hemichordata 41 



Heterophrentis prolifica 78 



Heterotrypa frondosa 47 



Hexacrinites leai 94 



Hexagonaria prisma *77 



Hinge, of brachiopods 36 



Hinge, of pelecypod 37 



Holocystites 72 



Holophragma calceoloides *60 



Homalonotus 71 



Homoeospira 65 



Homotrypa dawsoni 47 



Homotrypa flabellaris 47 



Homotrypella hospitalis 47 



Hormotoma whiteavsi *67 



Hustedia mormoni *111 



Hydnoceras *34. 



Hydrozoa 34 



I 



Igneous intrusions 10 



Insecta, general 39 



Pennsylvania 119 



Pleistocene 134 



Invertebrates, Pleistocene 122 



Ischyrodonta elongata 52 



Isonema humile *88 



Isotelus gigas *54 



Isotelus maximus 54 



Juresania *112 



Keys 4 



Brachiopods 



Devonian 80 



Mississippian 97 



Ordovician 48 



Pennsylvanian 109 



Silurian 62 



Bryozoa 



Devonian 79 



Ordovician 46 



Pennsylvanian 108 



Silurian 60 



Cephalopods 



Devonian 89 



Silurian 69 



Corals 



Devonian 75 



Ordovician 45 



Silurian 58 



Crinoids 



Devonian 93 



Echinoderms 



Silurian 71 



Gastropods 



Devonian 86 



Pennsylvanian 116 



Pleistocene 126 



Silurian 67 



Pelecypods 



Devonian 84 



Mississippian 101 



Ordovician 51 



Pennsylvanian 112 



Pleistocene 123 



Trilobites 



Devonian 91 



Ordovician 53 



Silurian 70 



Kionoceras *69 



Lampsilis *125 



Lasmigona *124 



Lecanocrinus waukoma *73 



Lechritrochoceras desplainense *70 



Leiorhynchus *82 



Length, of pelecypod 37 



Leperditia angulifera *70 



Lepidocarpon *107 



Lepidocyclus capax *49 



Lepidocyclus dentatum 49 



Lepidodendron *106 



Lepidostrobus 106 



Leptaena analoga ............ 99 



Leptaena rhomboidalis 64, 81 



Leptaena fichmondensis *49 



Lepidophyta 31 



Leptodea *125 



