INDEX 



Acadian series, 57. 



Acidaspis, 101. 



Actinopteriate, 135. 



Adirondack Mountains, 42-45, 81, 

 296 332. 



Africa, 89, 112, 132, 152, 168, 188, 

 189, 210, 211, 225, 255, 305, 307, 

 308, 372. 



Agassiz, L., 140. 



Age, 31. 



Alabama, 112, 122, 126, 164, 169, 

 236-237, 240-241, 248, 286, 287. 



Alaska, 9, 128, 144, 147, ICO, 163, 

 169, 181, 183, 204-205, 212, 220, 

 221, 248, 256, 284, 289, 330, 341, 

 366, 371. 



Albian formation, 237. 



AlgaB, 11, 54, 71-72, 91, 132-133, 170. 



Algonkian (see also Proterozoic) 

 period, 32, 42; rocks, 47-49; 

 subdivisions, 42, 49; correlation, 

 51; distribution of rocks, 53; 

 foreign, 53. 



Allegheny series, 158, 161-162. 



Allen, J., 174. 



Allosaurus, 270. 



Alps, 132, 187, 210, 255, 305, 306, 

 307, 308, 368, 372. 



Amber, fossils in, 4, 316. 



Ambonychia, 96. 



Ammonoids, 98-99, 135, 156-157, 

 175, 191, 214, 230, 258. 



Ammonites, 13, 99, 230, 258, 260, 

 314. 



Amoeba, 14. 



Amphibians, 13, 21; Devonian, 142; 

 Mississippian, 157; Pennsylvanian, 

 173, 177-179; Permian, 191, 193; 

 Triassic, 215; Jurassic, 232; Cre- 

 taceous, 261; Tertiary, 317. 



Ancyloceras, 260. 



Andes Mountains, 210, 249, 255, 309. 



Angiosperms, 11, 13, 170, 228, 256- 

 257. 



Animals, classification, 10, 11, 13-22; 

 earliest forms, 70-71. 



Animikean, 42, 49. 



Antarctica, 329, 368. 



Anthozoans, 13, 15, 73, 92-93, 114, 

 228. 



Anthrapalsemon, 176. 



Ants, 232. 



Apalachicola formation, 282, 287. 



Apennine Mountains, 306, 307, 308, 

 309. 



Appalachia, 62; Cambrian, 65; Or- 

 dovician, 84; Silurian, 108; Devo- 

 nian, 128; Mississippian, 148; 

 Permian, 185-186; Paleozoic, 195- 

 196; Triassic, 206; Cretaceous, 

 244, 276. 



Appalachian Mountain district, Cam- 



I brian, 58-59, 63; Ordovician, 81; 

 Silurian, 105-107, 110; Devonian, 

 121-126, 128, 130; Mississippian, 

 144-148; Pennsylvanian, 158-166; 

 Permian, 181-187; Paleozoic, 195- 

 197; Triassic, 203, 206; Creta- 

 ceous, 251-252; Tertiary, 292, 

 296-298. 



Appalachian Revolution, 183-187, 

 197. 



Aptian formation, 237. 



Aquia formation, 282. 



Arachnids, 13, 21, 76, 100, 116, 118, 

 136, 157, 175-176, 191. 



Arbuckle Mountains, 150. 



Archean, period, 32; rocks, 40-41; 

 subdivisions, 41-42; correlation of 

 rocks, 42-43; distribution of rocks, 

 44-45; foreign, 45-46; economic 

 products, 46. 



