﻿Alphabetical 
  Index 
  to 
  Genera 
  and 
  Subgenera. 
  

  

  Names 
  in 
  italics 
  are 
  synonyms. 
  

  

  Acambona, 
  II, 
  49 
  (797). 
  

   Acanthothyris, 
  II, 
  88 
  (836). 
  

   Acritis, 
  I, 
  111 
  (243). 
  

   Acrothele, 
  I, 
  117 
  (249). 
  

   Acrotreta, 
  I, 
  118 
  (250). 
  

   Actinoconchus, 
  II, 
  32 
  (780). 
  

   Agulhasia, 
  II, 
  12a 
  (874). 
  

   Ambocoelia, 
  II, 
  13 
  (761). 
  

   Amphiclina, 
  II, 
  72(820). 
  

   Amphiclinodonta, 
  II, 
  74 
  (822). 
  

   Amphigenia, 
  II, 
  100 
  (848). 
  

   Amphistrophia, 
  I, 
  151 
  (283). 
  

   Amphitomella, 
  II, 
  36 
  (784). 
  

   Anabaia, 
  II, 
  57(805). 
  

   Anastrophia, 
  II, 
  91 
  (839). 
  

   Ancistrocrania, 
  I, 
  129 
  (261) 
  

   AnisactineUa, 
  II, 
  39 
  (787). 
  

   Anomactinella, 
  II, 
  35 
  (783). 
  

   Anoplia, 
  I, 
  161 
  (293). 
  

   Anoplotheca,II, 
  53 
  (801). 
  

   Antiptychina, 
  II, 
  136 
  (884). 
  

   Antirhynchonella, 
  II, 
  94 
  (842). 
  

   Argiope, 
  II, 
  148 
  (896). 
  

   Athyris, 
  II, 
  29 
  (777). 
  

   Atretia, 
  II, 
  86 
  (834). 
  

   Atrypa, 
  II, 
  68 
  (816). 
  

   Atrypina, 
  II, 
  67 
  (815). 
  

   Aulacorhynchus, 
  II, 
  156 
  (904). 
  

   Aulacothyris, 
  II, 
  137 
  (885). 
  

   Aulonotreta, 
  I, 
  111 
  (243). 
  

   Aulosteges, 
  I, 
  165(297). 
  

   Austriella, 
  11,84(832). 
  

  

  Bactrynium, 
  II, 
  152 
  (900). 
  

   BarrandeUa, 
  II, 
  96 
  (844). 
  

   Barroisella, 
  I, 
  98 
  (230). 
  

   Beachia, 
  II, 
  102 
  (850). 
  

   Beecheria, 
  II, 
  118(866). 
  

   Bifida, 
  II, 
  53 
  (801) 
  

   Billingsella, 
  I, 
  141 
  (273). 
  

   Billingsia, 
  I, 
  106 
  (241). 
  

  

  Bilobites, 
  I, 
  137 
  (269). 
  

   Bittnerula, 
  II, 
  16(764). 
  

   Bouchardia, 
  II, 
  145 
  (893). 
  

   Brachyprion, 
  I, 
  149 
  (281). 
  

   Brachythyris, 
  II, 
  3 
  (751). 
  

  

  Cadomella, 
  I, 
  150 
  (282). 
  

   CamareUa, 
  II, 
  90(838). 
  

   Camarium, 
  II, 
  23 
  (771). 
  

   Camarophorella, 
  II, 
  90 
  (838). 
  

   Camarophoria, 
  II, 
  89 
  (837). 
  

   Camarospira, 
  II, 
  28 
  (776). 
  

   Camarotoechia, 
  II, 
  78 
  (826). 
  

   Camarothyris, 
  II, 
  139 
  (887). 
  

   Capellinia, 
  11,99(847). 
  

   Cardinocrania, 
  I, 
  130 
  (262). 
  

   Catazyga, 
  II, 
  65 
  (813). 
  

   Centronella, 
  II, 
  105 
  (854). 
  

   Charionella, 
  II, 
  27 
  (775). 
  

   ChoneteUa, 
  I, 
  162 
  (294). 
  

   Chonetes, 
  I, 
  160 
  (292). 
  

   Choniopora, 
  I, 
  128 
  (260). 
  

   Chonopectras, 
  I, 
  163 
  (295). 
  

   Chonostrophia, 
  I, 
  162 
  (294). 
  

   Choristites, 
  II, 
  8(756). 
  

   Christiania, 
  I, 
  158 
  (290). 
  

   Cistella, 
  11,148(896). 
  

   Clintonella, 
  II, 
  66 
  (814). 
  

   Cliothyris, 
  II, 
  31 
  (779). 
  

   Clitambonites, 
  I, 
  142 
  (274). 
  

   Clorinda, 
  11,96(844). 
  

   Coelospira, 
  II, 
  54, 
  (802). 
  

   Coenothyris, 
  II, 
  134, 
  (882). 
  

   Conchidium, 
  II, 
  94 
  (842). 
  

   Conotreta, 
  I, 
  118(250). 
  

   Conradia, 
  I, 
  105 
  (237). 
  

   Cransena, 
  II, 
  117(865). 
  

   Crania, 
  I, 
  128(260). 
  

   Craniella, 
  I, 
  130 
  (262). 
  

   Craniolites, 
  I, 
  128 
  (260). 
  

   Craniscus, 
  I, 
  129 
  (261). 
  

   191 
  

  

  