Editorial Comment.-The U. S. Geological Survey, 189.

Monthly Authors' Catalogue of American Geological Literature,191.

Correspondence.-Further note on Uintacrinus, FRANK SPRINGER, 194.

Personal and Scientific News, 195.

OCTOBER NUMBER.

Mineralogical and Petrographic Study of the Gabbroid

Rocks of Minnesota and more Particularly of the

Plagioclasytes. II. [Plate XX.]

WINCHELL...

ALEXANDER N.

197

Notes on the Fauna of the Burlington Limestone at

Louisiana, Mo. R. R. ROWLEY.

245

Review of Recent Geological Literature.-Glacial Erosion in the Valley

of the Ticino, W. M. DAVIS, 252.-The Geography of the Region

about Devil's Lake and the Dalles of the Wisconsin, with Notes on

Surface Geology, R. D. SALISBURY and W. W. ATWOOD, 252.

Monthly Authors' Catalogue of American Geological Literature, 253.

Correspondence.-Remains of the Mammoth in Arizona. WM. P.

BLAKE, 257.-Dr. Angelo Heilprin and the Decrease of Water in

Nicaragua, J. CRAWFORD, 257.

Personal and Scientific News, 259.

NOVEMBER NUMBER.

Mineralogical and Petrographic Study of the Gabbroid

Rocks of Minnesota and more Particularly of the

Plagioclasytes. III. ALEXANDER N. WINCHELL. 261

Pores in the Ventral Sac of Fistulate Crinoids. F. A.

BATHER

307

Some Curious Matters Illustrative of Geological Phe-

nomena. [Plates XXI and XXII.] B. K. EMERSON. 312

Certain Faunal Aspects of the Original Kinderhook.

C. R. KEYES

315

Review of Recent Geological Literature.-A Contribution to the Geol-

ogy of the Northern Black Hills, JOHN DUER IRVING, 322.-The

Moraines of Southwestern South Dakota, and their attendant De-

posits, JAMES E. TODD, 323.-Elements of Mineralogy, Crystal-

lography and Blowpipe Analysis, from a Practical Standpoint, A. J.

MOSES and C. L. PARSONS, 323.-A Hand-book of Rocks for Use

Without the Microscope, J. F. KEMP, 324.

Monthly Authors' Catalogue of American Geological Literature, 324.

Personal and Scientific News, 327.

DECEMBER NUMBER.

Notes on the Geology and Petrography of Monhegan Is-

land, Maine. E. C. E. LORD [Plate XXIII].

Mineralogical and Petrographic Study of the Gabbroid

Rocks of Minnesota and more Particularly of the

Plagioclasytes. A. N. WINchell.

Meteorology of the Ordovician. F. W. SARDESON. [ [II-

lustrated]

Editorial Comment, 391.

329

348

381

Review of Recent Geological Literature.-Scapolite Rocks from Alas-

ka, J. E. SPURR, 393. Graftonite, a New Mineral from Grafton,

N. H., and its Intergrowth with Triphylite, S. L. PENFifld,

393. Two New Occurrences of Corundum in North Carolina,

J. H. PRATT, 393.

Monthly Author's Catalogue of American Geological Literature, 394.

Personal and Scientific News, 397.

Index, 399.

Erratum.

On p. 132, line 26, for Devonian read Ordovician.

THEW YORK PUBER DENNAPY.