THE

GEOLOGICAL MAGAZINE

NEW SERIES.

DECADE III. VOL. IV.

JANUARY - DECEMBER 1887.

HENRY WOODWARD, LL.D., F.R.S., V.P.G.S., F.Z.S., F.R.M.S.,

OF THE BRITISH MUSEUM OF NATURAL HISTORY;

VICE-PRESIDENT OF THE PALEONTOGRAPHICAL SOCIETY,

MEMBER OF THE LYCEUM OF NATURAL HISTORY, NEW YORK; AND OF THE AMERICAN PHILOSOPHICAL
SOCIETY, PHILADELPHIA; HONORARY MEMBER OF THE YORKSHIRE PHILOSOPHICAL
SOCIETY; OF THE GEOLOGISTS' ASSOCIATION, LONDON: OF THE GEOLOGICAL
SOCIETIES OF EDINBURGH, GLASGOW, HALIFAX, LIVERPOOL, AND NOR-

WICH; CORRESPONDING MEMBER OF THE GEOLOGICAL SOCIETY

OF BELGIUM; OF THE IMPERIAL SOCIETY OF NATURAL

HISTORY OF MOSCOW; OF THE NATURAL HISTORY
SOCIETY OF MONTREAL; AND OF THE
MALACOLOGICAL SOCIETY

OF BELGIUM.

ASSISTED BY

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

OF THE BRITISH MUSEUM OF NATURAL HISTORY.

WILFRID H. HUDLESTON, M.A., F.R.S., Sec.G.S.

AND

GEORGE J. HINDE, PH.D., F.G.S., &c.

NEW SERIES. DECADE III. VOL. IV.
JANUARY-DECEMBER, 1887.

LONDON:

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

1887.