Fig. 5, appears to be a fungiform Spongite; its locality is not mentioned. Fig. 6. Portion of a fossil coral (_Ceriopora_), from Switzerland. Figs. 8, & 10. These pebbles have the surface covered with casts of Clionites (_Clionites Conybeari_, of Mr. Morris.[30]) [Footnote 30: Mr. Morris thus defines the generic character of these fossil bodies:--"Reticular masses of a more or less compressed globular, elliptical, or polygonal form; rugose and sometimes papillose; connected by minute tubuli or fibrillæ. Dendritical, dichotomous, or irregularly aggregated." _Clionites Conybeari_ is characterized by "Cells irregular, somewhat polygonal, with one or more papillæ; surface finely tuberculated, connecting threads numerous." Note from Mr. Morris, April, 1850. The fossils, however, do not appear to be the silicified sponge (_Cliona_) by which the ravages in the shell have been effected; they are merely casts of the cavities produced.] Fig. 9. Fragments of the radicle processes of attachment of some Apiocrinite or Lily-shaped animal in chalk; see description of Plate LI. Fig. 14. A section of a siliceous nodule; probably the cellular appearance is inorganic: fig. 13, is a magnified section of the cells. [Illustration: Plate XLI.] PLATE XLI. A Silicified cup-shaped Sponge, from Touraine. (_Chenendopora Parkinsoni_, of Michelin. _Spongites Townsendi_, of Mantell.) This beautiful plate of a petrified zoophyte allied to the Spongia, formed the frontispiece to Mr. Parkinson's second volume. The fossil delineated is from Touraine in France, and is one of the most perfect examples of this kind hitherto observed. It belongs to a group of cup-shaped _Amorphozoa_, (as these organisms are now named by naturalists, from the great irregularity of shape which they assume,) termed _Chenendopora_. The original organic substance is transmuted into silex, and the interstices are filled up with carbonate of lime. The same species occurs in the greensand in the Vale of Pewsey in Wiltshire, and, I believe, also in the white-chalk; for many cyathiform flints from the South Downs appear to have the same internal structure. In the so-called "gravel-pits," near Faringdon, in Berkshire,--which are quarries of a loosely-aggregated grit of the greensand, almost wholly made up of the relics of shells, corals, amorphozoa, &c.--numerous sponges of this genus are met with. One beautiful species (_Chenendopora fungiformis_) has acquired, from its cup-like form, the local name of "petrified salt-cellar."[31] [Footnote 31: Wonders of Geology, vol. ii. p. 637; and Medals of Creation, "Excursion to Faringdon," vol. ii. p. 923.] [Illustration: Plate XLII.] PLATE XLII. The Fossils represented in this Plate are chiefly Zoophytes in Flint.