441 
INDEX TO VOL. XIII 
Agassiz, A., Expedition to Bahamas, 141. 
Alga-. Value of supposed, as geological 
guides, J. F. -lames, 95. 
Analyses, Phosphate rocks, Tennessee, 
LOS ; New Jersey limestones, 154; Sierra 
Nevada rocks, 240, 303, 307, 809, 312, 314. 
Anthracite, Origin of, C. R. Keyes. 411. 
Arizona, ores, 419; petrified forest, 291. 
Autodetus, American sneciesof, and some 
Paramorphic shells from the Devonian, 
John M. Clarke. 327. 
B 
Backstrom, H.. Causes of Magmatic Dif- 
ferentiation, 104. 
Bahamas, A. Agassiz, 141. 
Bain, H. F., Peculiarities of the Mystic 
tic coal seam, 407. 
Baldwin, S. Prentiss, Pleistocene history 
of the Champlain valley, 170. 
Barlow, A. E., Relations of Laurentian 
and Haronian rocks north of lake Hu- 
ron, 63. 
Barton, G. H., Channels on Drumlins, 
224. 
Bascom, F., The structures, origin and 
nomenclature of the acid volcanic rocks 
of South Mountain, 122. 
Bather, F. A.. Crinoidea of Gotland, 355. 
Beachler, C. S., obituary, 440. 
Beecher, C. E., On the mode of occur- 
rence, and the structure and develop- 
ment of Triarthrus becki, '■ 8. 
Bell, Robert, Pre-paleozoic decay of crys- 
talline rocks north of lake Huron, 214; 
Sudbury mining district, 430. 
Bennettites dacotensis Macbride, Geo- 
logical position, S. Calvin, 79. 
Bering sea, G. M. Dawson, 137. 
Blake, J. F., Annals of British Geology, 
lo:,. 
Bolivia, ores. 48. 
Boston basin. VV. O. Crosby, 192. 
Brachiopoda, Revised classification of the 
spire-bearing, C. Scbuchert, 102, 128; 
Handbook, 193, 439; Evolution, Agnes 
Crane, 194. 
Brachiopuds and Crinoidsof the Missouri 
Hamilton, R. R. Rowley, 151. 
Brazil, ores, 49, 417, 420: Devonian fossils, 
127. 
British Drift Theories, Warren Upliam, 
Brumcll, H. P. II., 214,431. 
Bryson, John, Lake Konkonkoma and 
other Glacial Features of Long island, 
390. 
Bucking, H., Sulfoborit, 359. 
Callaway, ('., t Conversion of chlorite into 
biotite, 28ft. 
Calvin, Samuel, Geological Position of 
Bennettites dacotensis Macbride, 79; 
Friable sandstone in which the grains 
are enlarged by secondary deposition of 
silica, 225. 
Campbell, M. R., Paleozoic overlaps in 
Montgomery and Pulaski counties, Vir- 
ginia, 147. 
Canada, ores, 52, 418, 419; Annual report 
of the Geol. Survey, 429. 
Canadian Ice Age, J. \V. Dawson, 116. 
Carcinosoma, A new species, E. W. Clay- 
pole, 1 1. 
Chamberlin,T. C, Pseudo-cols. 217; (and 
F. Leverett) Past drainage systems of 
the upper Ohio river, 217. 
Champlain valley. Pleistocene history, S. 
Prentiss Baldwin, 170; trap dike.-, j. F. 
Kemp and V. F. Marsters, 126. 
Chemical composition of some of the 
white limestones of Sussex count\. \. 
J., F. L. Nason, 154,. 
Chile, ores. 49. 
Clark, W. B., Climate of Maryland, LS9; 
Greensands of N. •!., 210. 
Clarke, John M., New York reports. 19:;. 
439; Composite generic fundamenta, 286. 
Claypole, E. W., A new species of Carcin- 
osoma, 77. 
Clendenin, W. W., 133. 
Coal deposits of Iowa, C. R. Keyes. 353. 
Coleman, A. P., Interglacial fossils from 
the Don valley. Toronto, 85. 
Columbian Exposition. 
Gems. Native Metals, and other Bare 
Minerals, 415. 
Harvard University geological exhibit, 
279. 
Notes of Pleistocene geology, 109. 
Notes on some Mesozoic and Tertiary 
exhibits, 185; T. W. Stanton, 289. 
Notes on various exhibits relative to 
Mineralogy and Petrography, G. H. 
Williams, 345. 
Ores of the noble ami useful metals, 18. 
Vertebrate paleontology, John Eyer- 
man. 47 
Composite generic fundamenta. J. M. 
Clarke, 286. 
Coon butte, Arizona, 115. 
Correspondence. 
Additional facts about Nicollet. II. Y. 
\\ inchell, 120. 
Spire-bearing genera of the Palaeozoic 
Braohiopnda, C. Schnchert, 128. 
Some conditions of Rjpple-mark, T. A. 
Jaggar, Jr., 199. 
Oscillation and single-current Hippie- 
marks. J. E. Spurr. 201. 
Composite generic fundamenta, J. M. 
Clarke, 286. 
The Columbian Exposition : Notes on 
some Mesozoic and Tertian Exhib- 
its," T. \V. Stanton, 289. 
Discovery of Diceratherium. the two- 
horned Rhinoceros, in the White river 
beds of South Dakota, .1. B. Hatcher. 
300. 
Economic Geologj of the United States; 
Reply to Or. Penrose's Review, B S. 
Tarr, 361. 
Early Man in Minnesota, Warren Up- 
ham, 368. 
Note on the Chehalis sandstone, \.c 
Lawson. 436, 
Ni>te on the Keweenawan rocks of 
(irand Portage island, north coast of 
lake Superior. U. S. Grant, 137. 
Cragin, F. W . 1 lontribution to the inver- 
tebrate paleontology of t he Texas ( 're- 
taceous. 121 ; 2s9. 
Crane, Agnes, Bvolntion of the Brachio 
poda, 191 
