442 
Index. 
J 
Johnday formation, 291. 
Jordan, Arabah and the Dead Soa, Rus- 
sell, 480. 
Jurassic system, 262. 
Jura-trias system, 267. 
K 
Keokuk, group at Crawfordsville,Beach- 
ler. 4(17. 
Keyes, 0. R. Coal Measures of Iowa. 2.3, 
3'9o; Fauuaot the Coal Measures, 4:52. 
Lackawanna, Wyoming region, Branner, 
430. 
Lake-beaches at Ann Arbor, Spencer, 
66. 
Lapparent, de, the limits of the Cam- 
brian, .S66. 
Lapworth, C. on the Cambrian-Silurian, 
;{65. 
Laramie, the flora of, Ward, 56; forma- 
tion, 265. 
Late Tertiary, 278. 
Laurentian, its lionits iu the Archrean, 
1S2. 
Lawton, C. D , sketch of C. E. Wright, 
307. 
Le Conte, Prof. Jos. , the classification of 
the Tertiary, 283; Transfer of Lick 
Observatory, 428. 
Les dislocations, de I'ecorce terrestre, 
Margerie and Helm. 348. 
Lewis. Henry Carvill, biographical sketch 
of, 371. 
Lick Observatory, transfer to the re- 
gents of the University, 428. 
Life in the Archiean, 173. 
Lindahl, Dr. .losua, 66. 
Lignitic formation, 275. 
Lone Wolf mouutain, Texas, 433. 
Loupfork formation, 291. 
Lower Mississippi valley. Quaternary of, 
304. 
Lower Pa'eozoic, report of N. H. Win- 
ehell, 193; General principles, 195; Dis- ' 
cussion of evidence and opinion, 208; 
Use of the term Taconic, 208; Use of 
the term St. Croix. 2u9; Use of the 
terms Menevian and Ordovician, 211; 
Conclusions, 212; Synopses of the ob- 
jections of Mr. Walcott, 215; Note by 
the reporter on Mr. Walcott's views, 
220. 
Lower Silurian, correlation of horizons, 
Ulrich, 39. 
M 
Maillard, G. , on fossil algiie, 54. 
Map of Europe, 66, 176; of the Taconic, 
79. 
Marcou, Jules, on the adversaries of the 
Taconic. 10, 67; Classification and 
nomenclature, 129; The priority of tie 
term Taconic, 202; The geology of 
Quebec, 365. 
Margerie, E. on the fractures of the 
earth's crust, 348. 
Marr, John E. on the Cambrian-Silurian, 
364. 
Martin, James G., 431. 
Matthew, G. F. on Psammichnites and 
Trilobites, 1. 
McGee, W. J., Three formations of the 
Middle- Atlantic slope, 129. 137. 
Megalonyx beds, 294. 
Menevian, use of the term, 211. 
Mesozoic, report by Geo. H. Cook, 257; 
The Triassic. 257; The Cretacic, 259; 
The Mesozoic realm, 261; The post- 
Cretacic system, 265; Note on the Me- 
sozoic systems, 267. 
Meyer, Oito on the Tertiary of Eastern 
N. America, 88. 
Microdiscus, 6, 12. 
Mineral constitution, indication of geo- 
logical age, ltj8. 
Minerals— 
Serpentine, its origin in the Archiean, 
180. 
Rutley's text-book on rock forming 
minerals, 343. 
Pvritesand its rates of decomposition, 
Julien,3 44. 
The rock forming, Rosenbusch, 430. 
Muinesota Academy of Nat. Sciences, 65. 
Miocene, 2^7. 
Mitchell county, Texas, Broadhead. 433. 
Montmorenci, gt^ology of, E. Emmons, 
94; .'^elwyn, 134 
Mt. Stephen fossils, rt-joinder of Dr. 
Romiuger to C. D. Walcott, 3,.6. 
N 
Nathors*", A. G. the position of the 
Oleuellus beds, 356. 
Newberry, Dr J. S. nomenclature of the 
Lower PaleO/Oic, 203; classification of 
the Tertiary, 281; coals of Colorado, 
429. 
Niobrara formation, 264. 
Nutiing, C. C, 187. 
Oligocene, 276. 
On Hsammichnite^. and the early Trilo- 
bites of the Cambrian rocks in Canada, 
1 
Ordovician, use of the term, 211. 
Origin of the basins of the great lakes, 
Spencer, 346. 
Origin of the Lower Stratified crystal- 
lines, 171. 
Orton, Edward, geological su'vey of 
Ohio, 58. 
Packard, A. S. on the Syncarida, 131. 
Paleontological andstratigraphical prin- 
ciples vs. the Taconic, Marcou, 10. 
Parliament of Science in tne United 
States, 1 1 8 
Petrograpt^ical sub-divisions of the Ar- 
cbipan, 159. 
Petroleum and natural gas in N. Y., Ash- 
burner, 430. 
Pierre-formation, 264. 
Plistocene system, 294. 
Pockets of tire-clay in the Niagara-lime- 
stone, Parnsworth, 381 
Post-Cretacic system, 20-t 
Post Glacial geology of Ann Arbor, 
Wooldriilge, 35. 
Potomac formation, McGee, 129. 
Prestwich, Jos., geological text-book, 
341; nomenclature of the Quaternary, 
3()7. 
Primordial fauna discovered in Britain 
by Barrande, 77. 
Problems (of Devonian nomenclature) 
for settlement, :i45. 
Psammichnites in the Cambrian of Can- 
ada, 1. 
