THE

GEOLOGICAL MAGAZINE.

NEW SERIES.

DECADE II. VOL. VI.

JANUARY-DECEMBER. 1879.

THE

GEOLOGICAL MAGAZINE:

OR,

Monthly Journal of Geology:

WITH WHICH IS INCORPORATED

"THE GEOLOGIST."

NOS. CLXXV. TO CLXXXVI.

EDITED BY

HENRY WOODWARD, LL.D., F.R.S., F.G.S., F.Z.S.,

VICE-PRESIDENT OF THE GEOLOGISTS' ASSOCIATION;

MEMBER OF THE AMERICAN PHILOSOPHICAL SOCIETY, PHILADELPHIA ;

HONORAMY MEMBER OF THE YORKSHIRE PHILOSOPHICAL SOCIETY; OF THE GEOLOGICAL SOCIETIES
OF EDINBURGH, GLASGOW, AND NORWICH; CORRESPONDING MEMBER OF THE GEOLOGICAL
SOCIETY OF BELGIUM; OF THE NATURAL HISTORY SOCIETY OF MONTREAL; AND
OF THE LYCEUM OF NATURAL HISTORY, NEW YORK.

ASSISTED BY

PROFESSOR JOHN MORRIS, M.A., F.G.S., &c., &c.,

AND

ROBERT ETHERIDGE, F.R.S. L. & E., F.G.S., &c.

NEW SERIES. DECADE II. VOL. VI.
JANUARY-DECEMBER, 1879.

LONDON:

TRÜBNER & Co., 57 AND 59, LUDGATE HILL.
F. SAVY, 77, BOULEVART ST.-GERMAIN, PARIS.

1879.

LIBR

UNIVERSITY OF

CALIFOR