INDEX 



Acervularia ? inequalis, 317®. 

 Acidaspis callicera, 327^ 



tuberculatus, 306^ 307', 308\ 

 Aetinoceras luxum, 188', 327'; figures, 



187. 

 Actinopteria arenaria, 305^ 



boydi, 220^ 262'-, 265", 330*; fig- 

 ures, 218. 



eximia, 326®. 



securiformis, 147®; figure, 149. 



subdeeussata, 293'\ 



textilis, 147^ 307^ 308\ 308®, 309', 

 310- ; figures, 149. 

 Age of strata, 88--98=. 

 Agoniatite limestone, 208^ 23P, 252^; 



fossils, 329®. 

 Agoniatites expansus, 208*, 212^, 



329"; figures, following p. 211. 

 Altamont section, 280*'-83'. 

 Alveolites explanatus, 320^ 

 Ambocoelia, sp. nov. 305^. 



umbonata, 330", 332-. 

 Ami, cited, 228^ 

 Amphigenia elongata, 199% 295®, 326*, 



328°; figures, 200. 

 Anastropliia verneuili, 297% 306®, 309% 



322^ 

 Anoplia nucleata, 299% 305% 308% 

 Anoplotheca concava, 307^ 322% 

 Aragonite, 360®. 

 Archaeopteris jacksoni, 225®; figure, 



226. 

 Arclianodon catskillensis, 225®; figure 



225. 

 Arenaceous, term, 94®. 

 Arenyte, term, 94% 

 Ashburner, cited, 283% 

 Aspidocrinus callosus, 321% 



digitatus, 321% 



scutelliformis, 153% 155% 174% 252% 

 256% 289% 296% 300% 306% 307% 

 321% 323% 



Athyris spiriferoides, 213®-14% 261% 



261% 265% 265% 265®, 266®, 271% 292% 



328% 329% 332^; figures, 210. 

 Atrypa impressa, 183'; figures, 184. 



pseudomarginalis, 328®. 



reticularis, 137% 147% 15.V\, 174®, 

 199% 280% 283% 289% 289% 290% 

 294% 295% 296% 297% 298% 300% 

 301% 301% 304% 306% 306% 307% 

 307% 308% 309% 309% 309% 310% 

 313% 317®, 320% 322% 323% 328®; 

 figures, 138, 199. 

 impressa, 326% 



spinosa, 294% 304®. 

 Atrypina imbricata, 296% 308", 308% 



322% 

 Aulopora elongata, 324% 



schohariae, 32 P. 



tubula, 321*. 

 Avicula communis, 297% 



gebhardi, 324% 



manticula, 320% 



naviformis, 320% 



obliquata, 320% 



obscura, 319®. 



rugosa, 290®. 



subequilatera, 323®. 



tenuilamellata, 289®. 



textilis arenaria, 324®. 



umbonata, 320% 

 Aviculopecten fasciculatus, 330% 



formio, 330% 



idas, 330% 



pectiniformis, 328% 



phorus, 330% 



princeps. 262% 330% 



Bactrites clavus, 329®. 

 Ball's cave, 349--51% 

 Barytocelestite, 361% 

 Basal conglomerates, 123®. 

 Basal sandstones, 253% 

 Beachia suessana, 305®. 



