INDEX TO THE GENERA. 



(The names in Italic are Syno7iynis.) 



Acanthocladia, 44 

 Acanthopyge, 17 

 Acervularla, 14 

 Acrocoila, 121 

 Acroculia, 80 

 Actffion, 113, 159 

 Actinocrinus, 14, 40 

 Actinocyathus, 14 

 Adiantides, 29 

 Adiantites, 29 

 Aganides, 89 

 Alethopteris, 29 

 Allorisma, 62 

 Alveolites, 10, 33 

 Alyssites, 12 

 Ammonites, 115, 117 

 Amphelia, 133 

 Amphilielia, 133 

 Ampbistegina, 125 

 Amplexus, 33 

 Anarthrocanna, 95 

 Ancilla, 159 

 Ancillaria, 159 

 Ancyloceras, 116, 117 

 AneLmites, 29 

 Antholithes, 102 

 Antholithiis, 102 

 AntiUia, 133 

 Aphanaia, 62 

 Araclmoides, 138 

 Area, 62, 106 

 Ai'chaBOcyathus, 33 

 Arcliffiopteris, 29 

 Ai-ctocephalus, 173 

 Ai'giope, 105 

 Aspidorhynchus, 118 

 Astarte, 63, 106 

 Astartella, 63 

 Astartila, 63 

 Asterolepis, 91 

 Athyris, 46 

 Atomodesma, 107 

 Atrypa, 18, 47, 201 

 Aturia, 171 

 Aulopora, 11 

 Austrella, 197 

 Avicula, 64, 107 

 Aviculopecten, 64 

 Axincea, 156 

 Axophyllum, 34 



Bairdia, 41, 144 

 Balanopliyllia, 133 

 Banksia, 121 

 Belemnitella, 116 

 Belemnites, 116, 171 

 Belideus, 179 

 Bellerophon, 24, 79 

 Berenicea, 105 

 Eettongia, 172, 179 

 Beyrichia, 18 

 Billingsia, 34 

 Biloculina, 125 

 Bornia, 29 

 Bothriceps, 197 

 Bothrodendron, 32 

 Brachymetopus, 41 

 BracliythyriSy 22 

 Brontes, 15 

 Bronteus, 15 

 Buccinum, 159 

 Bulimus, 177 

 Bulla, 159, 177, 203 

 Bunyalites, 101 

 Buskia, 201 



Caberea, 144 

 Calamites, 30, 32 

 Calamopora, 11, 34 

 Calcar, 160 

 Calymeue, 15 

 Camarophoria, 47 

 Cameroceras, 89 

 Campophyllum, 34 

 Canda, 145 

 Canis, 196 

 Capulus, 80 

 Caixhai'odon, 171 

 Cardinia, 67 

 Cardiocarpon, 102 

 Cardiocarpum, 102 

 Cardiomorpha, 68 

 Cardita, 153 

 Cardium, 68, 158 

 Caryocaris, 15 

 Caryophyllia, 134 

 Cassiclaria, 160 

 Cassidulina, 126 

 Cassis, 160 

 Catenipora, 12 

 Catopygus, 138 



