Alphabetical Index to Genera and Subgenera. 
Names in italics are synonyms. 
Acambona, IT, 49 (797). 
Acanthothyris, II, 88 (836). 
Acritis, I, 111 (243). 
Acrothele, I, 117 (249). 
Acrotreta, I, 118 (250). 
Actinoconchus, II, 32 (780). 
Agulhasia, IT, 125 (874). 
Amboceelia, IT, 13 (761). 
Amphiclina, II, 72 (820). 
Amphiclinodonta, II, 74 (822). 
Amphigenia, IT, 100 (848). 
Amphistrophia, I, 151 (283). 
Amphitomella, II, 36 (784). 
Anabaia, IT, 57 (805). 
Anastrophia, IT, 91 (839). 
Ancistrocrania, I, 129 (261) 
Anisactinella, II, 39 (787). 
Anomactinella, IL, 35 (783). 
Anoplia, I, 161 (293). 
Anoplotheca, IT, 53 (801). 
Antiptychina, IT, 136 (884). 
Antirhynchonella, II, 94 (842). 
Argiope, II, 148 (896). 
Athyris, II, 29 (777). 
Atretia, IT, 86 (834). 
Atrypa, IT, 68 (816). 
Atrypina, II, 67 (815). 
Aulacorhynchus, II, 156 (904). 
Aulacothyris, II, 137 (885). 
Aulonotreta, I, 111 (248). 
Aulosteges, I, 165 (297). 
Austriella, II, 84 (882). 
Bactrynium, IT, 152 (900). 
Barrandella, II, 96 (844). 
Barroisella, I, 98 (230). 
Beachia, II, 102 (850). 
Beecheria, II, 118 (866). 
Bifida, IT, 53 (801) 
Billingsella, I, 141 (278). 
Billingsia, I, 106 (241), 
Bilobites, I, 187 (269). 
Bittnerula, II, 16 (764). 
Bouchardia, II, 145 (893). 
Brachyprion, I, 149 (281). 
Brachythyris, I, 3 (751). 
Cadomella, I, 150 (282). 
Camarella, II, 90 (888). 
Camarium, II, 23 (771). 
Camarophorella, II, 90 (838). 
Camarophoria, II, 89 (837). 
Camarospira, II, 28 (776). 
Camarotcechia, IT, 78 (826). 
Camarothyris, II, 139 (887). 
Capellinia, II, 99 (847). 
Cardinocrania, I, 180 (262). 
Catazyga, II, 65 (813). 
Centronella, IT, 105 (854). 
Charionella, II, 27 (775). 
Chonetella, I, 162 (294). 
Chonetes, I, 160 (292). 
Choniopora, I, 128 (260). 
Chonopectus, I, 163 (295). 
Chonostrophia, I, 162 (294). 
Choristites, IT, 8 (756). 
Christiania, I, 158 (290). 
Cistella, IL, 148 (896). 
Clintonella, IT, 66 (814). 
Cliothyris, IT, 31 (779). 
Clitambonites, I, 142 (274). 
Clorinda, II, 96 (844). 
Ccelospira, II, 54, (802). 
Ccenothyris, II, 134, (882). 
Conchidium, ITI, 94 (842). 
Conotreta, I, 118 (250). 
Conradia, I, 105 (237). 
Cranezena, II, 117 (865). 
Crania, I, 128 (260). 
Craniella, I, 180 (262). 
Craniolites, I, 128 (260). 
| Craniscus, I, 129 (261). 
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