392 



NEW YORK STATE MUSEUM 



Or this sp., 242'^. 

 Orthoceras, 355". 

 sp. 147^, 222^, 259'-6o', 267, 356^ 

 brainerdi, 296^ 

 helderbergiae, 207°, 259^, 267. 

 insulare, 301^ 

 Orthoceratidae, 336^ 

 Orthochoanites, 336", 33';'^. 

 Orthopora, 201^ 204^ 



regularis, 181^, 182^, 207®, 219^, 239^, 



263. 

 rhombifera, 181**, 182^, 207", 219^, 

 239', 263. 

 Orthothetes, 162I 

 becraftensis, I45^ 

 interstriatus, 351', 351', 351', 353*, 



356^ 

 woolworthanus, 185®, 189^ 195', 

 I97\ 197^, 197^, 198', 200', 208^, 

 220^ 233^, 241^, 242^, 265. 

 mut. gaspensis, I45^ 

 Ortonia, i6i\ 



sp., 157'. 

 Ostracoda, 268. 

 Oswego sandstone, 3431 



Palaeopinna flabellum, 146^ 

 Parastrophia hemiplicata, 157^ I57l 

 Parker, Sir Gilbert, cited, 136°. 

 Pelecypoda, 161^, 255^ 266. 

 Pelmatozoa, 238^, 262. 

 Penhallow, D. P., on fossil plants, 16®. 

 Perce, a brief sketch of its geology, 



by John M. Clarke, 79, 134^-71*. 

 Perce rock massive, I4I®-44^ 

 Phacops sp., 156®, 162^ 229*, 229", 268. 



bombifrons, I47^ 



correlator, I47^ 



logani, 144*, 147', 149', 156', i62\ 



^63^, 197^ 200^ 207^, 220\ 222^, 

 224*, 232-, 260^, 268. 



pipa, 260*, 268. 



rana, I93^ 230^ 231'. 



tumilobus, 163^ 

 Pholidops ovata, I44^ 197^, 219^, 224', 

 240*, 265, 



terminalis, 142*, I44^ 

 Phthonia cylindrica, I46^ 

 Phyllograptns shale, uppermost zone, 



6\ 



Piloceras, 326", 326', 329', 333'. 



sp., 301'. 

 figure, 302. 



amplum, figure, 329. 



explanator, explanation of plates, 

 376-84. 



newton-winchelli, 335^^, 336^, 336^ 

 337\ 339'. 

 Plates, explanations, 359-84. 

 Platyceras sp., 147®, 207*, 2ii\ 2i2\ 

 218', 224', 228', 257'-58\ 267. 



argynus nov., 143*, I47^ 



conulus nov., 147^ 



eucerus nov., 147*. 



cf. fornicatum, 147°. 



gaspense nov., 147*. 



gibbosum, 224^, 257-, 267. 



laciniatum nov., 147^ 



lamellosum, 189^, 257*, 267. 



cf. nodosum, 147^ 



paxillatum nov., 147^ 



platystoma, 185', 226°, 257*, 267. 



reflexum, 189^ 228^, 257®, 267. 



tenuiliratum, 212^, 257^, 267. 



tortuosum, 143^, 147^ 



ventricosum, 185®, 227^, 257^, 267. 

 Platyostoma, 162^ 

 Plectambonites sericeus, i6o\ 

 Plethorhyncha barrandei, 146*. 



pleiopleura, 146*. 

 Pleurotomaria sp., 209^ 267. 



delia, 146^ 



lydia, 146^ 



? rotula 7tov., 146^. 



cf. subdepressa, 351'. 



voltumna, 146^ 

 Port Ewen beds, 179^ 184', 193', 194*, 



I95^ 197^ 199*, 200^ 202^, 202*, 



203*, 212^ 212^, 226^, 226*, 234-, 



234'; collections of fauna, 5*; upper, 



205^, 206^; lower, 2o6^ 

 Port Jervis, lower Devonic rock sec- 

 tion at, 14^ 173-269. 

 Potsdam sandstone, fossil trails on, 



I8''-20^ 

 Poxino Island shale, 346^-47*, 348*. 

 Prismatophyllum inequalis, 349*, 35 1^ 

 Probolium perceensis, see Dalmanites 



(Probolium) perceensis. 



