392 



NEW YORK STATE MUSEUM 



Orthis sp., 242'. 

 Orthoceras, 355l 

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

 brainerdi, 2g6^. 

 helderbergiae, 207^, 259'', 267. 

 insulare, 301*. 

 Orthoceratidae, 336^ 

 Orthochoanites, 336^ 337\ 

 Orthopora, 201^ 2041 



regularis, 181*, 182^, 207*^, 219^ 239', 



263. 

 rhombifera, 181', 182*, 207°, 219^, 

 239', 263. 

 Orthothetes, 162'. 

 becraftensis, 1451 

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



356^ 

 woolworthanus, 185", I89^ 195^ 

 i97\ 197% 197^ I98^ 200', 208', 

 220', 233\ 241', 242', 265. 

 mut. gaspensis, I45^ 

 Ortonia, i6i\ 



sp., 157*. 

 Ostracoda, 268. 

 Oswego sandstone, 343'. 



Palaeopinna flabellum, 146^ 

 Parastrophia hemiplicata, 157', I57^ 

 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, i34'-7i*- 

 Perce rock massive, 141^-44^. 

 Phacops sp., 156', 162', 229*, 229', 268. 



bombifrons, I47^ 



correlator, I47^ 



logani, 144*, 147', 149', 156", 162', 

 163^ 197^, 200®, 207^ 22o\ 222^, 



224*, 232^ 26o^ 268. 



pipa, 260*, 268. 



rana, 193', 230^ 231'. 



tumilobus, 163". 

 Pholidops ovata, I44^ I97^ 219', 224', 

 240*, 265. 



terminalis, I42^ 144^ 

 Phthonia cylindrica, 146*. 

 Phyllograptus shale, uppermost zone, 



6\ 



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



sp., 3oi\ 

 figure, 302. . 



amplum, figure, 329. 

 j explanator, explanation of plates,. 



! 376-84. 



newton-winchelli, 335^, 336^, 336%. 

 337\ 339'. 

 Plates, explanations, 359-84. 

 Platyceras sp., 147^ 207*, 211*, 212V 

 2I8^ 224% 228\ 257'-58\ 267. 



argynus nov., 143^ 147*. 



conulus nov., 147^. 



eucerus nov., 147*. 



cf. fornicatum, 147^. 



gaspense nov., 147*. 



gibbosum, 224^, 257^, 267. 



laciniatum nov., 147^. 



lamellosum, I89^ 257*, 267. 



cf. nodosum, I47^ 



paxillatum nov., 147'. 



platystoma, 185^ 226', 257*, 267. 



reflexum, I89^ 228', 257", 267. 



tenuiliratum, 212^ 257', 267. 



tortuosum, 143^, 147*. 



ventricosum, 185', 227', 257', 267. 

 Platyostoma, I62^ 

 Plectambonites sericeus, i6o\ 

 Plethorhyncha barrandei, 146*. 



pleiopleura, 146*. 

 Pleurotomaria sp., 209^ 267. 



delia, 146°. 



lydia, 146". 



? rotula nov., 146". 



cf. subdepressa, 35 1'. 



voltumna, 146^. 

 Port Ewen beds, 179', 184', i93", i94'r 



195*, 197", 199*, 200^ 202', 202*, 



203*, 212^ 212", 226', 226*, 234', 

 I 234^ ; collections of fauna, 5* ; upper, 



205", 206^; lower, 206'. 

 Port Jervis, lower Devonic rock sec- 

 tion at, I4^ 173-269. 

 Potsdam sandstone, fossil trails on, 



lS'-20\ 



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

 Prismatophyllum inequalis, 349*, 35 1^- 

 Probolium perceensis, see Dalmanites 

 (Probolium) perceensis. 



