INDEX OF GENERA. 



In addition to indexing the Genera in the whole work, the gender of each genus is 

 designated — m, for masculine ; /, feminine ; n, neuter. 



PAGE. 



Acambona, /. 103 



Acanthaspis, / 227 



Acanthocladia, / 289 



Acanthograptus, m.. 2^62 



Acantholepis, / 227 



Acantholoma 208 



Aeanthophyton, n 21 



Acanthotelson, n 208 



Acervularia, / 46, 262 



Aeheloma, n ... 323 



Acidaspis, / 208, 316 



Aclis 143, 300 



Aclisina,/ 300 



Acondylacanthus, m227, 319 



Acrocrinus, m 66-279 



Acroculia 143 



Acrolepis. /. 227 



Acrophyllum, n 46, 262 



Acrotre'ta, /. 103 



Actinoceras, n. . ... 165, 305 



Actinocrinus, m 66, 279 



Actinodesma, n 180, 309 



Aegilops 103, 294 



Agaricia 46 



Agaricocrinus, m . . .69, 279 



Agassiehthys . 227 



Agassizocrinus, m . . .69, 279 



Agassizodus, m 228 



Agelacrinus, m 69, 279 



Aglaspie, f 209, 316 



Agnostus, m 209, 316 



Agraulos, m 209,316 



Alecto 95, 289 



Alethopteris, /. 21, 248 



Allagecrinus," m 279 



Alloprosallocrinus, m 70, 279 



Allorisma, n 180, 309 



Alveolites, m 46, 262 



Amacanthus, m 228, 319 



Amblypterus, m 228 



Ambocoelia, f. 103 



Ambonyehia", / 181, 309 



Ammonites 305 



Ampheristocrinus, m.. . .279 



Amphibamus, m 240 



Amphicoelia, /. 181 



Amphigenia, / 104 



Amphion, m 209 



Amphipeltis, / 209, 316 



Amphoracrinus, in.. .70, 279 

 Amplexopora, /. 289 



PAGE. 



Amplexus, m . . .46, 243, 262 



Ampullaria 143 



Ampyx, m 209 



Amygdalocystites,m. 70, 279 



Anaclitacanthus, m 228 



Anartbrocanna, ). 22 



Anastrophia, /. . ... 104, 294 



Anatina, /. 181, 309 



Ancyrocrinus, m 70 



Aneimites, m 22 



Angellum, n 309 



Anisodexis, m 323 



Anisophvllum, n . ... 262 



Annularia, /. 22, 248 



Anodontopsis, /. 182 



Anomalocrinus, m. . .70, 279 

 Anomalocystites, m 70, 279 



Anomalodonta, / 182 



Anomaloides 280 



Anomia 104 



Anomites 104 



Anomphalus, m 143 



Anopolenus, m 209 



Antholithes, m 22,248 



Anthophyllum, n. 46 



Anthracerpes, m 224 



Anthracomya,/ 182 



Anthraconectes, m 209 



Anthracopakemon, m.. 210 

 Anthracoptera, /.. ..182, 309 



Anthracopupa, / 300 



Anthracosia, / 182 



Antliodus, m 228 



Apedodus, m 228 



Aphlebia./. 248 



Apiocystites, m 70 



Arabellites, m 313 



Arachnocrinus, m . .. . 280 

 Arachnophyllum, n. . . 262 



Araucarites, m 22 



Area 182, 309 



Archaeobelus, m 323 



Archaeocaris, / 210 



Archaeocidaris, f. . . .70, 280 



Archseocrinus, m 2S0 



Archaeopteris,/. ... .22, 248 



Archegogryllus, m 225 



Archaeocyathellus, m... .260 



Archaeocyathus, »i 42 



Arcbimedes, m 95 



Archimedipora 95 



PAGE. 



Archimylacris,/ 225, 319 



Architarbus, n 224 



Archiulus, m 224 



Arctinurus 316 



Arenicolites, m 206 



Arges, m 210, 316 



Arionellus, m. 210,316 



Aristophycus 248 



Arthraria, /. 22 



Arthroclema, n 95, 289 



Arthrolycosa, /. 224 



Arthronema, n 289 



Arthrophycus, n. 23 



Arthrostigma, n 23 



Artisia, / 23 



Asaphiscus 210 



Asaphoidichnus, m 316 



Asaphus, m 210,316 



Ascoceras, n 165 



Ascodictyon, n 289 



Asolanus . 248 



Aspidella, / 141 



Aspidichthys, m 228 



Aspidocrinus, m 71 



Aspidodus, m 228 



Asplenites, m 23 



Astarte, f. 182 



Astartella, / 182,309 



Asteracanthus, m 228 



Asterias 71 



Asterocarpus, m 23 



Asterocrinus 71 



Asterophycus, n. . . 23, 248 

 Asterophyllites, m. . .23, 248 



Asteropteris, /. 248 



Asteropty chins, m. .228, 320 



Asterosteus, m 228 



Astrma 46,262 



Astrgeophyllum, n 262 



Astraeospongia, / 42 



Antrios 71 



Astrocerium, n 47 



Astroconia, n. 260 



Astrocrinites 71 



Astylospongia, / ... .42, 260 



Atactopora, / 289 



Ataxocrinus 71 



Ateleocystites, m 71 



Athyris, / 104,294 



Atops,/ 211, 316 



Atrypa, /' 105, 294 



