INDEX TO GEOLOar AND PALEONTOLOGY OF SCHOHARIE VALLEY 381 



Paracyclas lirata, 26P, 26 P, 266^ 

 304S 33 P. 



tenuis, 332*. 

 Parazyga deweyi, 285^ 305^ 309\ 

 Parodiceras discoideum, 212% 294% 



329^; figure, 211. 

 Peneplanation of region, 34P. 

 Pentagonia unisulcata, 196% 294% 



295% 328'; figures, 199. 

 Pentanierella arata, 183% 199% 294% 

 295% 326% 328^; figures, 184. 



pavilionensis, 292% 

 Pentamerus ( Sieberella ) galeatus, 



282% 

 Pentamerus limestone, 282^^ 283% 



284% 285% 290^ upper, 153%' 

 Phacops cf. bombifrons, 299^. 



cristata, 191% 295% 327^; figures, 

 191. 

 var. pipa, 294% 



logani, 151% 297% 306% 307% 307% 

 308*, 310% 323^; figures, 151. 



rana, 2'22% 331^; figures, 220. 

 Phaenopora tenuis, 32 P. 

 Phanerotinus laxus, 200% 328«; figure, 



201. 

 Pholadella radiata, 331% 

 Pholidops sp., 307% 310% 



areolata, 325^. 



ovata, 305% 



terminalis, 305^. 

 Phragmoceras corallopliilum, 318% 

 Pliyllograptus angustifolius, 302^. 



postrenius, 302% 

 Physiography of the Schoharie 



region, 333^-52% 

 Pittsford shale, thickness, 120% 

 Platyceras sp., 309^. 



agreste, 323% 



arcuatum, 323% 



bisulcatum, 322% 



clavatum, 323% 



crassum, 328% 



eurvirostrum, 323®. 



dumosum, 199% 294% 304% 328"; 

 figures, 201. 



elongatum, 323% 

 ? var., 323% 



Platyceras gebhardi, 151% 297% 305% 

 322'; fig-ures, 149. 



gibbosum, 281% 



incile, 322% 



intermedium, 322% 



multisinuatum, 322^; figures, 150. 



nodosum, 168% 288% 305% 325% 

 328'; figure, 167. 



obesum, 323% 



perlatuni, 322% 



perplieatum, 322% 



pileiforme, 322% 



platystoma, 322^. 

 alveatum, 3'22^. 



plicatile, 322% 



plicatum, 323%; figure, 150. 



pyramidatum, 323% 



reflexum, 305®. 



retrorsum, 285%, 322% 

 abnorme, 322% 



robostum, 322% 



sinuatum, 322% 



spirale, 322®; figure, 150. 



subnodosum, 325% 



suleoplicatum, 322*. 



tenuiliratum, 281% 322% 



tortuosum, 525% 



trilobatum, 322% 



undatum, 328^. 



unguiforme, 322^. 



ventricosum, 151% 280% 285% 297% 

 322^; figures, 149. 

 Platycrinus tentaculatus, 321% 

 Platyostoma sp., 308% 308% 



ventricosum, 288% 

 Plethomytilus arenaceus, 326% 



oviformis, 330% 

 Plethorhyneha barrandei, 162"; figure, 

 163. 



fitchana, 305% 324% 



pleiopleura, 162% 305"; figures, 163. 

 Pleurotomaria sp., 318^. 



arata, 183% 326^; figures, 185. 



capillaria, 221% 33 1^ figure, 219. 



filitexta, 331% 



labrossa, 323% 



rotalia, 304% 



? subdepressa, 318% 



