INDEX TO GEOLOGY AND PALEONTOLOGY OF SCHOHARIE VALLEY 37T 



Ischadites bursiformis, 325". 

 squamifer, 324^. 



Isochilina sp., 308^ 308^ 



Ithaca formation, 223^-25", 234^ 

 267^ 27 P, 273% 274*; thickness, 

 223-; fossils, 332^; uses, 356^ 



Kaaterskill creek, section of Devon- 

 ian rocks made in, 275^-76*. 

 Kemp, cited, 128^ 17 P. 

 Kionoceras darwini, 318°. 

 Knox, section near, 279*-80®. 



Laevidentalium sp., 311\ 

 Lamellibranch, 309'. 

 Leda brevirostris, 330^ 

 diversa, 330^ 

 obscura, 330^. 

 Lepadocrinus gebhardi, 137% 320'; 



figure, 137. 

 Leperditia alta, 112% 112% 117% 

 239% 240', 246% 248% 251% 282% 

 290% 290% 291% 291% 297% 298% 

 301% 301^ 310% 311% 311% 312% 

 319% 320- ; figure, 115. 

 jonesi, 111% 238% 239% 257% 318% 



319% 

 sealaris, 111% 132% 318^; figure, 

 111. 

 Leptaena rhomboidalis, 145% 174% 

 195^-96% 236% 280% 281% 285% 

 289% 289% 294% 296% 296% 298% 

 299^ 300% 301% 304% 306% 306% 

 307S 308% 309% 310% 313^, 317% 

 320% 321% 325% 328^; figures, 144, 

 194. 

 ventricosa, 324% 

 Leptaenisca concava, 296^, 309'. 

 Leptocoelia acutiplicata, 304% 305% 

 flabellites, 162% 288% 299% 305% 

 324'; figures, 164. 

 Leptodesma rogersi, 293^, 330^. 

 Leptostrophia becki, see Stropheodon- 

 ta (Leptostrophia) becki. 

 magnifica, 162% 305*; figures, 160. 

 magniventer, 305% 

 oriskania, 299", 305% 

 perplana, 181^, 304^; figures, 182. 



Lichas bigsbyi, 323*. 



(Ceratolichas) dracon, 329% 

 (Conolichas) eriopis, 204% 329"; 



figures, 205. 

 (Terataspis) grandis, 327% 

 (Ceratolichas) gryps, 329". 

 (Conolichas) hispidus, 327'. 

 ( Dicranogmus ) ptyonurus, 318% 

 pustulosus, 321% 323% 

 Lichenalia sp., 297% 307\ 

 cf. concentrica, 317^ 

 torta, 289% 289% 308% 308% 309% 

 309% 309% 309'. 

 Lime mudrocks, origin, 128^. 

 Limoptera macroptera, 262-. 331% 

 Linden limestone, 174^. 

 Lindsley, cited, 316% 

 Lindstroemella aspidium, 262^^, 330% 

 Lingula centrilineata, 280% 281'. 

 ceryx, 325'. 

 densa, 304*, 330% 

 perlata, 320% 321% 

 punctata, 292', 330% 

 rectilatera, 321% 

 spathata, 321% 

 Lintner, Charles, acknowledgments 



to, 81% 

 Lioclema ponderosum, 324^. 

 Liopteria bigsbyi, 266', 271% 272% 

 293% 330% 332% 

 dekayi, 293% 332% 

 greeni, 330^. 

 leai, 330'. 

 mitchelli, 330% 

 troosti, 330% 

 Liorhynchus limitaris, 207% 329% 

 multicostum, 261% 329% 

 mysia, 207^ 209«, 251% 329% 329%- 

 figures, 210. 

 Little Schoharie creek, section along,. 



261*-63% 

 Lockport dolomites, thickness, 120% 

 Longwood (Salina) shales. 125\ 171®. 

 Lorraine beds, 99% 121% 242«-43%. 

 253% 282^-83% 284% 286% 29P, 

 292^; thickness, 99% 

 Lower Helderberg group, 133*; De- 

 vonic age of higher portio'vj, 133% 



