GEOLOGY DEPARTMENT, BtBfcBECK COLLEGE, E.C.4 GEOLOGICAL MAGAZINE; OB, Journal afl

WITH WHICH 19 INCORPORATED

"THE GEOLOGIST."

NOS. LV. TO LXVI.

KDITED BY HENEY WOODWAED, F.G.S., F.Z.S.

HONORARY MEMBER OF THE OEOLOGICAL SOCIETIES OF EDINBURGH, GLASGOW, AND NORWICH J CORRESPONDING MEMBER OF THE NATURAL HISTORY SOCIETY OF MONTREAL; AND OF THE LYCEUM OF NATURAL HISTORY, NEW YORK.

ASSISTED BY PEOFESSOE JOHN MOEEIS, F.G.S., &c, &c,

AND EOBEET ETHEEIDGE, F.E.S.E., F.G.S., &c.

"VOL. "VI.

JANUARY—DECEMBER, 1869.

LONDON: TEUBNEE & Co., 8 AND 60, PATEENOSTEE EOW. CH. DELEGRAVE BT CIE, 78, RUE DES ECOLES, PARIS. LEIPSIC: F. A. BROCKHAUS. TURIN & FLORENCE : H. LOESCHER. NEW YORK: LEYPOLDT & HOLT 1869.

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PLATES PAGE I. II. Coniferous Fruits, etc., from Secondary Rocks 1 III. Limb-bones of Trogontherium Cwvieri, Fischer, from the Cromer Forest-bed 49 IV. Beania gracilis, Carr., Oolitic Shales of Yorkshire. Zamia muricata, Willd. Macrozamia spiralis, Miq. 97 V. Flemingites Pedroanus, Carr., Coal M., Brazil 151 VI. Noeggerathia obovata. Odontopteris Plantiana, Brazil . . 151 VII. Jaw of Strophodus from the Oolite of Caen 193 VIII. Eucladia Johnsoni, H. Woodw., Upper Silurian, Dudley . . 241 IX. Mandibular and Palatal Teeth of Ctenodus, Coal-measures . 314 X. uSHchmodus obicularis, Morris, Lower Lias, Lyme Regis . . 337 XI. Lingula monilifera, Linnarsson. Eophyton Linnceanwm, Torell 393 XII. Eophyton Linnoeanum, Torrell 393 XIII. Eophyton Torelli, Linnarsson 393 XIV. Map of the Chesil Bank and the neighbouring coast . . . 433 XV. View of the Chesil Bank and the " Fleet" or " Backwater" . 433 XVI. Tooth of Machairodus, found in the Norfolk Forest-bed at Cromer 440 XVII. Burrows of Mollusca in Carboniferous Limestone, Great Ormes Head 483 XVIII. Plants from the Skiddaw Slates 494 XIX. Mural Agates 529 XX. Eophyton? explanation, Hicks, Lower Arenig Rocks, St. • ' ' " David's . .' 53

LIST OF WOODCUTS.

Ideal representation of Old Pacific Continent, to illustrate the theory of the gradual subsidence of the land and the formation of Coral- reefs 11 Cliff-section seen on the south of Speeton Beck, in September, 1868 . 14 Teeth of Ctenoptychius 43 Molar Teeth of Trogontherium Cuvieri . 49, 51 Rough Sketch of Honister Crag, Buttermere Valley 56 Borrowdale Fells 57 Lie of the Beds along Eel Crags 58

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Boulder-clay Cliff south of Workington, Cumberland 72 Boulder-clay overlying Shell-beds, Rampside, Peel Harbour, Cumberland 7 2 Stratified Beds in the Lower Boulder-clay, from which were obtained the remains of Bos primigenius 74 Section from Portingscale, along the west side of Derwentwater, to Castle Crag, in Borrowdale 107 Natural Section of Beds seen in the Escarpment at the " Serra Partida," River Candiota 149 Belemnites prwmaturus, Tate 166 Diagram of the Glacial Terraces at the Fork of the Yangma Valley . 191 Sections of Drift at Hawker's Hill 207 Lower jaw and teeth of Gestracion Philippi 236 Foliage and Fruits of Calamites ' 294 Fruits of Equisetum and Calamites 295 Fruits of Selaginella and Triplospirites 297 Section of Gault and Lower Greensand at Lower Fettleworth . . . 335 Figures'to illustrate enlargement on Crinoidal Columns 352 Sketch showing Mav/m, with an accompanying bank of recent Drift, a ravine being seen in the latter '. . . 407 Section of recent Drift-bank • • i • • * • ' " " ' ' ^^ Recent Drift banked on a hill-slope below an escarpment . . . . . 408 Plan' of streams flowing to a shore where there ia a curretit1 chiefly in one direction . .'.-...... '••. :•".;'• .' . . 437 Lepracanthus Cold, Owen, Coal-measures, Ruabon, N. Walss ;, . . 481 Section of supposed burrow of Helix in Carboniferous Limestone . . 486 Sketches of a piece of Cornish hornstone. . 529,530 A portion of felspathie rock, in which two crystals of1 labradorite are separated by a crystalline mass of mixed labradorite and hyper- stein ..... 530 Banded and brecciated agates 533, 534 Profile of Terraces on the side of a Chalk Hill near Twyford1. '. . ''. 537 Terraces near Stockbridge ...... '.'I .' .' .'V .688 Terrace and Bank caused by descent of Silt -. »,,;; .v'.-iv^>i/. --538 Terraces near Llangollen . . . . , . . . ,-.•.. 541 Theddiv/m subserratum, Tate, sp. nov 552 Peculiar form of variegation in Cambrian Slate 576

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