310 BRITISH AVONIAN CONODONT FAUNAS 
New Providence Shale, 56, 59 
Non Calcareous Measures, 27 
North Crop (see South Wales Coalfield) 
North Greens Limestone, 30, 268 
North Scar Gill, 28 
North Staffordshire, 7 
Northumberland, 13, 26 
Northumbrian Trough, 13 
Octoplicata Shale, 17 
Oil Shales, 13 
Oil Shale Group, Lower, 29 
Oklahoma, 9, 56, 59 
Old Red Sandstone, 18 
Ordovician, 5 
Oreton, 25, 244 
Oreton Quarry, 262 
Osage series, 59 
Ostracods, 11, 13, 20 
Ozarkodina, 168, 195 
compressa, 169-170, 173 
curvata, 168-169 
delicatula, 170-171 
cf. delicatula, 177 
cf. elegans, 177 
hindei, 171-173 
macer, 173 
macra, 174 
parva, 174-175 
plana, 175 
plumula, 175-176 
cf. congesta, 176 
sp., 178 
Palaeogeography—British Carboniferous, 12 
Palate Bed, 20 
Palmatolepis, 53 
glabra subsp. indet., 53, 179 
gracilis, 53 
Paoli Formation, 10 
Paraconodonts, 5 
Passage Group, 29 
Patrognathus, 4, 32, 54, 63, 87, 178, 245 
variabilis, 36, 46, 48, 52, 87, 178, 179 
Patrognathus variabtlis—S pathognathodus 
plumulus Assemblage Zone, 36, 48 
Pelecypods, 11 
Pella Formation, 10, 63 
Pembrokeshire, 22, 244 
Pendleian, 18 
Pennsylvanian, 7, 177 
Pentamerus Beds, 5 
Pen-y-garnedd Limestone, 5 
Peracuta Shale, 17 
Pevicyclus kochi, 18 
princeps, 9, 65 
Pericyclus Stage, 8 
Phragmodus, 136 
Pierson Formation, 59 
Pilton Beds, 6, 54 
Pittenweem, 30 
Plectospathodus, 181 
? sp. A, 181 
sp. B, 181 
Polygnathus, 34, 62, 182, 213, 245 
bischoffi, 35, 42, 61, 184-185 
? claviger, 92 
communis, 34, 40, 48, 60-61, 64 
communis communis, 42, 182, 183, 184 
fustformis, 201 
inornatus, 35, 39, 46, 48, 63, 185 
inornatus imoynatus, 34, 36, 38, 48, 57, 
185-186, 192 
inornatus vostvatus, 34, 38, 48, 186-187 
inoynatus vexatus, 35, 187, 188 
lacinatus, 35, 41, 46, 51, 60, 62, 185, 188 
lacinatus asymmetricus, 35, 41, 188 
lacinatus circaperipherus, 189 
lacinatus lacinatus, 35, 41-42, 189-191 
lacinatus prelobatus, 190-191 
lacinatus Zone, 41, 57, 59, 277 
lobatus lobatus, 34, 36, 38, 48, 185, 191-192 
lobatus inflexus, 35, 38, 192 
macrus, 211 
nodomarginatus, 55 
ovthus, 221 
sp., 192, 193 
Portishead Beds, 17 
Portugal, 8 
Pre-Welden Shale Formation, 56 
Prioniodina, 90, 193-194, 197 
eveica, 194-196 
laevipostica, 35, 195-197 
latevicrescens, 196 
owen, 196-197 
prelaevipostica, 197 
stipans, 45, 198 
subaequalis, 45, 198-199 
subcurvata, 90, 194 
? sp. NOov., 199, 200 
Prolecanites discoides, 18 
Prospect Hill Siltstone, 9, 10 
Pyrotocanites, 18, 60 
Pseudobreccias, 22, 27 
Pseudopolygnathus, 32-34, 40, 42, 55, 180, 
200, 204, 207, 213, 226, 236, 239, 245 
