INDEX TO VOL. XV. 
Acid eraptives of northeastern Maryland, 
C. R. Keyes, 39. 
Adams, F. D., A further contribution to 
our knowledge of the Lanrentian, 67. 
Agassiz, Louis, Life of, 399. 
Age of the earth, 382. 
Age of the Galena limestone, N. H. 
Winchell. 33 
Alabama, Geological map of,E. A. Smith, 
58. 
Alabama Geological Survey, Report on 
the geology of the Coastal plain, E. A. 
Smitli, 266. 
American Association for the Advance- 
ment of Science, 195. 
American Tertiary Aphidse, S. H. Scud- 
der, 123. 
Ami, H. M., Note on a collection of Si- 
lurian fossils from cape George, An- 
tigonish. Nova Scotia, 264. 
An amusing error, 120. 
Annals of British geology, 1898, J. F. 
Blake, 387. 
Arctic climate, secular changes of, 254. 
Auriferous gravels of the Sierra Nevada, 
H. W. Turner, 371. 
Average elevation of the United States, 
Henry Gannett, 62. 
B 
Bailey, E. H. S., 400, 
Bain, H. F., 335 ; Central Iowa section of 
the Mississippian series, 317. 
Baltzer, .V., Remarks on the Berner Ober- 
land sections of Prof. II. Golliez in the 
geological handbook of Switzerland, 
1894, 62. 
Banded structure of some Tertiary gab- 
bros in the Isle of Skye, A. Geikie and 
J. J. H. Teall, 123. 
Barlow, A. F., On some dikes containing 
huronite, 68. 
Bascom, Dr. Florence, 336. 
Bayley, W. 8., 67, 6S; The peripheral pha- 
ses of the great gabbro mass of north- 
eastern Minnesota, 67 ; A summary of 
progress in mineralogy and petrogra- 
phy in 1894, 186. 
Beecher, C. E., Further observations on 
the ventral structure of Triarthrus, 91. 
Beitr.ige zur Kenntuiss der Gattung Oxy- 
rhina, C. R. I>astman, 267, 
Bell, Robert, Oq the honeycombed lime- 
stones in the bottom of lake Huron, 68. 
Bergeron, J., Trilobites de I'ordovicien 
d'Ecalgrain, 262. 
Broadhead.G. C.,400. 
Brown, E. F., 272. 
Bryson, John, The ups and downs of 
Long Island, 188. 
Buchtel College, Paleontological notes 
from, E. W. Claypole, 1, 363. 
Burlington limestones. Erosion during 
the deposition of the, F. M. Fultz, 128. 
(^^amptonito dikes near Danbyborough, 
Vt., V. F. Marsters, 368. 
Canadian localities of the Tacoiiic erup- 
tives, N. H. Winchell, 356. 
Case, E. C, On the mud and sand dikes 
of the White Riv( r Miocene, 248. 
Central Iowa section of theMississippian 
series, H. F. Bain, 317. 
('ephalopod beginnings, J. M. Clarke 
125. 
Chamberlin, T. C, 66, 67 ; Glacial phenom- 
ena of North America, 53; Recent gla- 
cial studies in Greenland, 197 ; Notes on 
_ the glaciation of Newfoundland, 203. 
Cladodont sharks. Recent contributions 
to our knowledge of the, E. W. Clay- 
pole, 363. 
Cladodns clarki. On a new specimen of, 
E. W. Ciaypole. 1. 
Clark, W. B.,67, 329. 
Clarke. J. M., Sketch of G. H. Williams, 
69; Cephalopod beginnings, 125. 
Claypole, E. W., 187, 399; On a new speci- 
men of Cladodus clarki, 1 ; Recent con- 
tributions to our knowledge of the Cla- 
dodont sharks. 363. 
Clendeuin, W. W., 130. 
Climatic conditions shown by North 
American interglacial deposits, Warren 
Upham, 273. 
Clypeastridae, A new Cretaceous genus of, 
F. W. CragiD,90. 
Coast ranges, A contribution to the geol- 
figy of, A. C. Lawson, 342. 
(^ohen, E,, Meteoritenkunde, 328. 
Columbus formation in northwestern Il- 
linois, O. W. Hersliey, 7. 
Conanicut island, R. 1., The geology of, 
G. L. Collie, 386. 
Contribution to the geology of the Coast 
ranges, A. ('. Lawson, 342. 
(Correction, F. B. Taylor, 394. 
Cragin, F. W., A new Cretaceous genus of 
CiypeastridBP, 90. 
Cretaceous fossil plants from Minn., Leo 
Lesquereux, 384. 
Crucial points in the geology of the Lake 
Superior region, N. H. Winchell, 153, 
229, 295, 356. 
Crystalline limestones, ophiolites, and 
associated schists of the eastern Adi- 
rondacks, .J. F. Kemp, 67. 
Crystallized slags from copper smelting, 
A. C. Lane, 68. 
(Cummins, W. F., A question of priority, 
395. 
Cushing, H. P., The faults of Chazy 
township, Clinton Co., N. Y., 66. 
Daimonelix, Remarks on, J. T. James, 
337. 
Dana, J. D., 836 ; Manual of geology, 259. 
Danbyborough, Vt., Cami>tonite dikes 
near, V. F. Marsters, 368. 
Dartou,N. H.,67, 68. 
Dawson, (i. M., 195. 
Deep shaft at Livonia, N. Y., 879. 
Denton. F. W.. 272. 
Description de quelques trilobites de 
I'ordovicien <rEcalgrain, J. Bergeron, 
262. 
Development of the corallnin in Favo- 
sites forbesi, var. occidentalis, G. H. 
Girty, 131. 
