DESCRIPTION OF PLATE VI.

Illustrative of the Structure of Fossil Teeth.

Fig.1a.—Tooth of Psammodus porosus, from the Mountain Limestone. See [p. 587].
1b.—Vertical section, a portion × 75 linear.
1c.—Transverse section of the same, × 75.
2a.—Tooth of Ptychodus polygurus, from the Chalk, near Lewes. See [p. 585].
2b.—Portion of longitudinal section, × 20.
2c.—Portion of transverse section, × 20.
3b.—Tooth of the Labyrinthodon Jægeri, from the New Red sandstone near Wirtemberg; half the natural size: the specimen presented by Dr. Jæger. See [p. 742].
3a.—A moiety of a transverse polished section, × 20.
3b.—Portion of a vertical section near the apex, × 20.
3c.—One of the anfractuosities of fig. 3a × ×.
4a.—Crown or upper portion of a tooth of a young Iguanodon, from Tilgate Forest. See [p. 697].
4b.—Portion of a vertical section of the above, × 20.
4c.—A small portion of a transverse section of the same, × 20.
5.—Tooth of Goniopholis, Tilgate Forest: half the natural size. See [p. 678].
6a.—Tooth of a reptile (probably of the Hylæosaurus), from Tilgate Forest; half the natural size. See [p. 690].
6b.—Portion of a vertical section of the same, × 20.
7a.—Tooth of Megalosaurus, from Tilgate Forest. See [p. 687].
7b.—Portion of a vertical section of the same, × 10.
8.—A small portion of a vertical section of a tooth of Dendrodus. See [p. 618].
9.—Portion of a transverse section of the base of a tooth of Ichthyosaurus, × 20. See [p. 665].
10a.—Tooth of Lepidotus, Tilgate Forest. See [p. 606].
10b.—The upper figure is a transverse section, and the lower a vertical section of the same, × 20.

[LIST OF LIGNOGRAPHS IN VOL. I.]

(Illustrative of Fossil Botany.)

LIGN.PAGE
[1.]Sections of Recent Vegetables55
[2.]Sections of Fern-Stems62
[3.]Nodule of Ironstone, enclosing a Fern Leaf69
[4.]Siliceous Frustules of Diatomaceæ, and Spicules of Spongillæ94
[5.]Fossil Gallionellæ96
[6.]Organic Bodies in Porcelain Earth97
[7.]Microphytes from the Tertiary deposits at Richmond, U.S.98
[8.]Confervites Woodwardii101
[9.]Chondrites Bignoriensis102
[10.]Delesserites (Fucoides) Lamourouxii103
[11.]Moss and Conferva in transparent quartz104
[12.]Equisetum Lyellii105
[13.]Equisetites columnaris106
[14.]Calamites decoratus107
[15.]Calamites in Coal-shale108
[16.]Pecopteris Sillimani110
[17.]Pachypteris lanceolata112
[18.]Sphenopteris elegans112
[19.]Sphenopteris nephrocarpa113
[20.]Sphenopteris Mantellii113
[21.]Cyclopteris trichomanoides114
[22.]Neuropteris acuminata115
[23.]Glossopteris Phillipsii116
[24.]Odontopteris Schlotheimii116
[25.]Anomopteris Mougeotii117
[26.]Tœniopteris latifolia118
[27.]Fig. 1, Pecopteris Murrayana118
2, Pecopteris lonchitica118
[28.]Lonchopteris Mantellii119
[29.]Fig. 1, Phlebopteris Phillipsii120
2, Phlebopteris propinqua120
[30.]Clathropteris meniscoides121
[31.]Caulopteris macrodiscus123
[32.]Base of a Trunk of a Sigillaria, with root126
[33.]Sigillariæ, in Coal Shale128
[34.]Sigillaria Saullii129
[35.]Silicified Stem of Sigillaria elegans130
[36.]Stigmaria ficoides133
[37.]Transverse section of Stigmaria ficoides135
[38.]Erect Stem of a Sigillaria, with Roots136
[39.]A Terminal Branch of a Lepidodendron138
[40.]Lepidostrobi, the Fruit of Lepidodendra141
[41.]Stems of Halonia and Knorria, from the Coal Formation144
[42.]Asterophyllites equisetiformis147
[43.]Fig. 1, Sphenophyllum Schlotheimii148
2, Sphenophyllum erosum148
[44.]Fossil Fruits, or Seed Vessels149
[45.]Foliage and upper part of the Stem of Cycas revoluta (recent)150
[46.]Part of a leaf of Pterophyllum comptum152
[47.]Part of a leaf of Zamites pectinatus 153
[48.]Fruit of Zamites Mantellii154
[49.]Fossil Fruits of Cycadeous Plants156
[50.]Mantellia nidiformis 157
[51.]Mantellia cylindrica158
[52.]Clathraria Lyellii, inner Axis of the Stem of159
[53.]Clathraria Lyellii, Stem of160
[54.]Clathraria Lyellii, part of Stem of161
[55.]Clathraria Lyellii, Petiole of161
[56.]Clathraria Lyellii, summit of Stem, with petioles162
[57.]Clathraria Lyellii, water-worn Stem of163
[58.]Fragment of Coniferous Wood in Flint174
[59.]Fig. 1, Part of a Branch of Araucaria peregrina176
2, Calamites nodosus, with foliage 176
[60.]Walchia hypnoides 178
[61.]Abietites Dunkeri179
[62.]Thuites Kurrianus 180
[63.]Nipadites and other Fossil Fruits from the Isle of Sheppey188
[64.]Fossil Fruits from the Isle of Sheppey189
[65.]Fossil Wood perforated by Teredines193
[66.]Fossil Fresh-water Plants196
[67.]Fossil Fruits and Flower198
[68.]Imprints of Dicotyledonous leaves in Gypseous Marlstone201

(lllustrative of Fossil Zoology.)

[69.]Coral and Spongites224
[70.]Fossil Zoophytes 227
[71.]Fossil Sponge228
[72.]Fossil Zoophytes229
[73.]Siphoniæ from the Greensand231
[74.]Polypothecia dichotoma232
[75.]Choanites Königi234
[76.]Paramoudra in the Chalk237
[77.]A group of Spiniferites in Flint239
[78.]Spiniferites Reginaldi241
[79.]Spiniferites palmatus241
[80.]Flints, the forms of which are derived from Zoophytes243
[81.]Ventriculites radiatus 244
[82.]Portions of Ventriculites245
[83.]Ventriculites alcyonoides248
[84.]A Coral Polype, in flint 250
[85.]Graptolites in Wenlock Limestone 255
[86.]Favosites polymorpha258
[87.]Corals from the Dudley Limestone261
[88.]Fossil Corals262
[89.]Corals from the Chalk and Mountain Limestone268
[90.]Stems of Encrinites and Pentacrinites284
[91.]Recent Comatula and Fossil Crinoidea286
[92.]Fossil Crinoidea 289
[93.]Apiocrinites291
[94.]Actinocrinites and Pentacrinite294
[95.]Cyathocrinites planus296
[96.]Marsupites Milleri 300
[97.]Fossil remains of Star-fishes305
[98.]Goniaster Mantelli306
[99.]Asterias prisca308
[100.]Fossil Turban Echinus with its Spines311
[101.]Cidarites from the Oolite and Chalk316
[102.]Fossil Spines of Cidarites319
[103.]Echinital remains in flint320
[104.]Echinites from the Chalk323
[105.]Holectypus inflatus324
[106.]Discoidea castanea325
[107.]Micraster cor-anguinum328
[108.]Toxaster complanatus329
[109.]Foraminifera from the Chalk342
[110.]Nummulites, or Nummulina344
[111.]Foraminifera from the Chalk 347
[112.]Spirolinites in flint349
[113.]Nonionina Germanica (recent)350
[114.]Foraminifera in Chalk and flint351
[115.]Chalk-dust, chiefly composed of Foraminifera355
[116.]Section of a Rotalia in flint356
[117.]Rotalia in flint, with the fossilized body of the animal in the shell358
[118.]Soft Bodies of Foraminifera extracted from the Chalk359
[119.]Remains of Foraminifera in chalk and flint361
[120.]Fossil Oyster, from the Chalk374
[121.]Recent Bivalve Mollusc, showing the several parts of the shell and the animal 377
[122.]Turritellæ from Bracklesham383
[123.]Shell-Conglomerate385
[124.]Shell-Limestone, from the mouth of the Thames386
[125.]Terebratula and Rhynchonella388
[126.]Terebratula and Spirifer390
[127.]Shells and Echinite from the Oolite and Lias397
[128.]Spondylus spinosus in Chalk-flint399
[129.]Inoceramus Cuvieri of the Chalk401
[130.]Flint with fragments of Inoceramus perforated by Clionites403
[131.]Unio Valdensis415
[132.]Cyclas and Melanopsis416
[133.]Fossil Shells of Gasteropoda 418
[134.]Polished Slab of Purbeck Marble422
[135.]Univalves from the Chalk of Touraine427
[136.]Univalves from the Mountain Limestone428
[137.]Murchisonia bilineata430
[138.]Sphærulites from the Chalk431
[139.]Coprolites and Molluskite432