CONTENTS.

Page.
Thoughts on a Pebble: Part I.[5]
More Thoughts on a Pebble: Part II.[33]
"The Nautilus and the Ammonite"[57]
Supplementary Notes[61]
NoteI.Shells in Chalk[61]
——II.Wood in Flint[66]
——III.Whitby Ammonites[69]
——IV.Fossil Nautili[72]
——V.Brighton Cliffs[75]
——VI.Rotaliæ in Chalk and Flint[79]
——VII.Isle of Wight Pebbles[82]
——VIII.Zoophytes of the Chalk[87]
——IX.Minute Corals from the Chalk[92]
——X.Infusorial Earths[97]

LIGNOGRAPHS.

Page.
1.[Vignette of Title-page.]
2.Fossil Turban-echinus (Cidaris), with spines.[9]
3.Bivalve with spines (Plagiostoma spinosum) in chalk; from Lewes.[11]
4.Teeth of several species of the Shark tribe, in chalk; from Lewes.[12]
5.Chalk-dust highly magnified, consisting of minute shells.[13]
6.Shells (Rotaliæ) from the chalk, highly magnified.[14]
7.Ammonite (A. communis) from the Lias, at Whitby.[20]
8.Nautilus (N. elegans) from the chalk-marl, Lewes.[22]
9. View of the Cliffs east of Brighton.[27]
10.Fossil animalcules (Xanthidia) in flint.[35]
11.Xanthidium palmatum, in flint.[37]
12.Rotalia in flint.[39]
13.Minute scales of fishes in flint.[40]
14.Choanites from the chalk; near Lewes.[44]
15.A branch of fossil coral attached to the pebble[46]
16.Coral-polype in flint.[47]
17.Minute Corals from chalk.[50]
18.Fossil cases or shields of animalcules from Richmond, Virginia; highly magnified.[53]
19.Several species of Lamp-shells (Terebratulæ) from the chalk, near Brighton.[63]
20.Silicified Oyster from the chalk.[65]
21.Coniferous wood in flint, from Lewes Priory.[68]
22.Several species of Ammonite.[69]
23.The body of a recent microscopic animalcule (Nonionina), the shell having been removed by immersion in acid.[81]
24.A branch of Sponge in flint; a minute Coral from chalk; and a section of a pebble enclosing a zoophyte (Siphonia Morrisiana).[85]
25.Flints deriving their shapes from Zoophytes (Ventriculites).[89]
26.Ventriculites in chalk; from Lewes.[90]
27.Portions of three kinds of recent corals.[94]