INDEX OF GENERA. 



Ill 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.. . 262 



Acantholepis, / 227 



Acantholoma 208 



Acanthophyton, n 21 



Acanthotelson, n 208 



Acervularia, / 46, 262 



Acheloraa, n. . . .323 



Acidaspis, / 208, 316 



Aclis 143, 300 



Aclisina,/ 300 



Acondylacanthus, ?n227, 319 



Acrocrinus, m 66-279 



Acroculia 143 



Aerolepis, /. 227 



Acrophyllum, n 46, 262 



Acrotreta, /. 103 



Actinoceras, n. ... 165, 305 



Actinocrinus, m 66, 279 



Actinodesma, n 180, 309 



Aegilops 103,294 



Agaricia 46 



Agaricocrinus, m . . .69, 279 



Agassichthys . 227 



Agassizocrinus, m . . .69, 279 



Agassizodus, m 228 



Agelaerinus, m 69, 279 



Aglaspis, / 209, 316 



kAgnostus, m .209, 316 

 Agraulos, m 209, 316 

 ^ Alecto 95,289 



i Alethopteris, /. 21, 248 



Allagecrinus, ?7i 279 



AUoprosallocrinus, m 70, 279 



Allorisma, n 180, 309 



Alveolites, m 46, 262 



Amacanthus, m 228, 319 



Amblypterus, m 228 



Ambocoelia, /. 103 



Ambonychia* / 181, 309 



Ammonites 305 



Ampheristocrinus, m.. . .279 



Amphibamus, m 240 



Amphicoelia, /. 181 



Amphigenia, / 104 



Amphion, m 209 



Amphipeltis, / 209, 316 



Aniphoracrinus, m.. .70, 279 

 Amplexopora, /. 289 



PAGE. 



Amplexus, m . . .46, 243, 262 



Ampullaria. 143 



Ampyx, m 209 



Amygdalocystites, m. 70, 279 



Anaclitacanthus, m 228 



Anarthrocanna, J 22 



Anastrophia, /. 104, 294 



Anatina,/. 181, 309 



Ancyroerinus, m 70 



Aneimites, m 22 



Angellum, n 309 



Anisodexis, m 323 



Anisophyllum, n . ... 262 



Annularia,/. 22, 248 



Anodontopsis, /. 182 



Anomalocrinus, m. . .70, 279 

 Anomalocystites, m 70, 279 



Anoinalodonta, / . .182 



Anomaloides 280 



Anomia . .' 104 



Anomites 104 



Anomphalus, m 143 



Anopolenus, m 209 



Antholithes, m 22, 248 



Anthophyllum, w. 46 



Anthracerpes, m 224 



Anthraeomya. / 182 



Anthraconectes, m 209 



Anthracopala3mon, m.. 210 

 Anthracoptera, /. . . .182, 309 



Anthracopupa, / 300 



Anthracosia, / 182 



Antliodiis, m 228 



Apedodus, m 228 



Aphlebia./. 248 



Apiocj^stites, m 70 



Arabellites, m 313 



Araehnocrinus, m . .. .. 280 

 Arachnophyllum, n. . . 262 



Araucarites, m 22 



Area 182, 309 



Archaeobelus, m 323 



Archaeocaris, / 210 



Archaeocidaris, f 70, 280 



Archaeocrinus, m 280 



Archaeopteris,/. 22, 248 



Archegogryllus, m 225 



Archaeocyathellus, m... .260 



Archaeocyathus, m 42 



Archimedes, m 95 



Archimedipora 95 



PAGE. 



Archimylacris,/ 225, 319 



Architarbus, n 224 



Archiulus, wi 224 



ArcUnurus 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 



Aepidodus, m 228 



Asplenites, m 23 



Astarte, /. 182 



Astartella, / 182, 309 



Asteracanthus, w 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 



Astroea 46, 262 



Astraeophyllum, n 262 



Astraeospongia, / 42 



Afftrios 71 



Astrocerium, n 47 



Astroconia, n. 260 



Astrocrinites 71 



Astylospongia, / 42, 260 



Atactopora, /. .' 289 



Ataxocrinus 71 



Ateleocystites, in 71 



Athyris, f 104,294 



Atops,/ 211, 316 



At.rypa, f 105, 294 



