INDEX 



387 



Cycadeoidea, 227. 

 Cycadofilices, 11, 12, 172-174. 

 Cyphaspis, 115. 

 Cyrtoceras, 97-99. 



Cystoids, 13, 16-17, 73, 93, 114, 134, 

 155. 



Dakota, formation, 237, 242, 256, 



277; time, 246. 

 Dall, W. H., 292. 

 Danian formation, 237. 

 Dana, J. D., 11, 33, 34, 312, 381. 

 Darton, N. H., 182, 205, 227, 249, 



259, 296. 

 Darwin, C, 3. 

 Dawson, 387. 

 Dean, B., 137, 138. 

 Decapods, 215, 231-232, 261. 

 Deccan, 255. 

 Deiphon, 115. 

 De Lapparent, A., 89, 111, 131, 151, 



167, 189, 211, 224, 253, 254, 306, 



307, 308. 

 Delaware, 240. 

 Delaware River, 297. 

 Deposits, land, 5; river and lake, 6; 



marine, 6. 

 Devonian, period, 8, 32, 120-142; 



origin of name, 120; subdivisions, 



120-121; rock distribution, 121- 



124; character of rocks, 122-125; 



thickness, 125; igneous rocks, 125; 



physical history, 125-130; foreign, 



131-132; climate, 132; economic 



products, 132; life of, 132-142. 

 Diatoms, 133, 311-312. 

 Dibranchs, 13, 20, 215, 231, 314. 

 Dicotyledons, 11, 13. 

 Dictyonema, 92. 

 Didymograptus, 92. 

 Dikellocephalus, 57, 75. 

 Dinosaurs, 215, 234, 263, 266-271, 



311. 

 Dioon, 226. 

 Diplodocus, 268. 

 Diplograptus, 92. 

 Diplomystus, 316. 

 Dipnoans, 138-139, 157, 215, 232. 



Dipterus, 139. 



Dismal Swamp, 164. 



Dcedicurus, 370. 



Dogger series, 219. 



Dolomite, 69. 



Double Mountain series, 180. 



Drift, glacial, 329, 337. 



Drumlins, 339-340. 



Du Bois, 375. 



Duckworth, W. H., 376, 377. 



Dunkard series, 180-181. 



Eagle Ford formation, 237-242. 



Eanthropus, 378-379. 



Earth, age of, 1; physical geography 

 of, 1; chronology, 7; origin, 35-39; 

 pre-geologic, 35. 



Earth's history, summary of stages, 

 39. 



Eastman-Zittel, book by, 34. 



Echinoderms, 13, 15-17; Cambrian, 

 73; Ordovician, 93; Silurian, 114r- 

 115; Devonian, 134; Mississip- 

 pian, 155-156; Pennsylvanian, 

 173; Permian, 191; Triassic, 213- 

 214; Jurassic, 229-230; Creta- 

 ceous, 258; Tertiary, 313. 



Echinoids, 13, 17, 18, 93, 115, 156, 

 174, 191, 213-214, 229-230, 258. 



Echinozoans (see also Echinoids), 13, 

 17, 18, 134. 



Edentates, 370-371. 



Edwards and Haime, 113. 



Elephant, evolution of, 322-325. 



Elephas, 323. 



Emergence, of land, 29. 



Emerson, B. K., 203, 208. 



Enaliosaurs, 215, 234, 263-266. 



Endogenous plants, 12. 



England (see also British Isles), 9, 

 115, 120, 152, 210, 219, 225, 231, 

 236, 254, 309, 378. 



Eocene series, 281-288. 



Eohippus, 319-321. 



Epoch, 31. 



Equisetse, 11, 12, 133, 154, 171, 173, 

 190, 212, 227, 256. 



Equus, 318, 320-321. 



