306 BRITISH AVONIAN CONODONT FAUNAS 
Carlops, 30, 50 
Carmarthenshire, 5 
Catcraig, 30 
Cavusgnathus, 35, 43-44, 62, 77-78, 85, 150, 
180, 219, 236, 242, 245 
alta, 77, 78 
charactus, 35, 43, 79-80, 83 
convexus, 35, 50, 80-81, 83 
cristatus, 43, 51, 80-81 
vegularis, 81 
naviculus, 45, 50, 81-82, 84 
unicornis, 35, 43-44, 82-84 
? sp. nov. A, 84 
Cavusgnathus unicornis—A patognathus 
libratus Zone, 43, 51, 61 
Celloni Zone, 5 
Cementstones, 13 
Cementstone Group, 13, 29 
Centrognathus spurius, 68 
Cephalopod, 7, 9, 65 
Chapel Hill Limestone, 10 
Chapel Point, 30, 266 
Chappel Limestone, 106, 203 
Chester, 10, 45, 63 
Chouteau Formation, 40-41, 55-57, 64, 277 
Chudleigh, 6 
Cladognathus primus, 130 
Clee Hills, 25 
Cleistopora Zone, 15, 20, 246, 261 
Clevedonian, 15 
Cleveland Hills, 7 
Clifton, 21, 22 
Clown Marine Band, 7 
Clydagnathus, 4, 32, 53-54, ©3, 84, 178-179, 
219, 230, 236, 245 
cavusformis, 32, 84-86, 88 
darensis, 32, 41, 48, 86-87, 89 
gilwernensis, 32, 36, 38, 48, 86, 87-88 
sp. nov. A, 88-89 
unicornis, 32, 40-41, 48, 88 
Coal Farm, 30, 270 
Coal Measures, 7 
Colsterdale Marine Beds, 7 
Concretionary Beds, 20, 22, 253 
Conodonts, affinities of, 4 
composition of, 4 
function of, 5 
Coral—brachiopod zones, 13-16, 20, 21 
Cornbrook Sandstone, 25 
Costatus Zone, 53 
County Clare, 7 
Cracoean, 18 
Craigmore Ironstone, 7 
Craig-y-Dinas, 23 
Craven Lowlands, 13 
Crinoids, 11, 20-21 
Craig Limestone, 5 
Ctenognathus murchisoni, 222 
Cu I Stage, 4, 11, 36, 39, 53-55, 65, 200, 203, 
PG 
Cu I—Cu II Stages, 236, 277 
Cu II Stage, 4, 9, 11, 39-43, 55-57, 59-62, 
64-65, 150, 236, 277 
Cu III Stage, 4, 44-45, 61-64, 277 
Culm facies, II 
Cumberland, 6 
C, Subzone, 15, 18, 31, 42, 57, 62, 245, 277 
C2S; Subzone, 15, 18, 25, 43, 46, 277 
C Zone, 15, 17, 22, 51, 60, 62, 65, 245 
Dalry, 30 
Dark Shale unit, 55 
Derbyshire and Nottinghamshire Coalfield, 7 
Devon, 18 
Devonian, 5-8, 11, 53, 54, 77, 107, 126, 167, 
178, 181, 200, 202, 222, 243 
Devonian—Carboniferous boundary, 6, 54, 
2360 
Dibunophyllum Zone, 15-16, 18, 23, 244, 254, 
255, 250 
Dinant Basin, 62 
Dinantian, 9, 15, 17 
Diplodella, 110 
Dockra Limestone, 30, 51, 272 
Dolhognathus, 35, 64-65 
excavatus, 64 
latus, 65 
Drumbuie House, 30 
Dryburn Foot, 30 
Dunbar, 30, 45-50, 244, 264-266, 277 
Durham, 26 
D, Subzone, 4, 15, 17, 21, 25, 27, 44, 46, 62, 
277 
De Subzone, 4, 15, 17, 21, 23, 27, 44-46, 50, 
62-63, 245, 259, 277 
D3 Subzone, 4, 44-45, 50-51, 260, 277 
D Zone, 15, 18, 22-23, 32, 42, 51, 61-62, 78, 
149, 193, 196, 245, 254 
East Germany, 8 
East Ogwell, 6 
Edenbrook Beds, 6 
Edenork, 6 
Eifelian, 6 
Eire, 45 
