Ill 
CONTENTS. 
JANUARY NUMBER. 
Henry Rowe Schoolcraft. [Portrait.] 1 
Classification and origin of the chief geographic features 
of the Texas region. [Map] Robert T. Hill 9 
On Laurentian as applied to a quaternary terrane. 
Joseph F. James 29 
Casts of Scolithus flattened by pressure. [Illustrated.] 
Atreus Wanner 35 
Extinct volcanoes in Colorado. [Illustrated.] Arthur 
Lakes 38 
Notes on the geology and scenery of the islands form- 
ing the southerly line of the Santa Barbara chan- 
nel. [Illustrated.] Lorenzo G. Yates 43 
Review of recent geological literature. — North American geology and pal- 
eontology, S. A. Miller, 52. — A dictionary of the fossils of Penn- 
sylvania, J. P. Lesley, 53. — Report on the lands of the Buena 
Vista company, W. H. Ruffner, 53. — Development of some Si- 
lurian brachiopoda, Beecher and Clark, 54. — Report on the 
geology of the Rainy lake region, A. C. L.vwsox, 55. — Metamor- 
phism of rocks, A. Irvixg, 56. — Geology of Colorado ore deposits, 
A. Lakes, 57. — New fossils from Manitoba, J. F. Whiteaves, 58- 
— Geological survey of Minnesota, 17th report, N. H. Winchell, 
58. — The rivers and valleys of Pennsjdvania, W. M. Davis, 60 — 
The structure of drumlins, Warren Upiiam, 61. 
Recent Publications. 61. 
Correspondence. — Letter from M. A. Levy, 62. — The fossils of the Trin- 
ity beds, EoBT. T. Hill, 62. 
Personal and Scientific News, 62. 
FEBRUARY NUMBER. 
Notes on a Kansas salt mine. [Illustrated.] Robert 
Hay 65 
Classification and origin of the chief geographic features 
of the Texas region, [ii.] Robt. T. Hill 68 
On the Silurian system of rocks. [Illustrated.] Roder- 
ick Impey Murchison 80 
Illustration of the "level of no strain" in the crust of 
the earth. [Illustrated.] E. W. Claypole 83 
The origin of the present outlines of the Bermudas. J. 
Walter Fewkes 88 
On some of the causes of extinction of species. J. M. 
McCreery 100 
An attempt to explain glacial lunoid furrows. A. . S. 
Packard 104 
Editorial Comment. — The Azoic system. 106. 
Review of recent geological literature. — Contributions to the micro- 
palaeontology of Canada, E. 0. Ulrich, 107— Kentucky fossil 
2.t ^^^ 
