NOTES. 
43 
worms ; these perforations, when the shell has been imbedded in 
flint, are filled with silex ; the flint having been removed by diluvial 
agency from its original situation in the Chalk, the shell has been 
absorbed, leaving the casts under notice, figures of which are en¬ 
graved in Organic Remains, vol. II. tab. 8, fig. 10, and tab. 12, 
fig. 3 ; Geol. Trans . vol. ii. tab. 12, and Edinburgh Phil. Trans. 
vol. ix. tab. 25 and 26. 
Terebratulce. —Very beautiful casts of the species common to the 
Chalk, (denominated Hysterolites, Geol. Trans. 2nd ser. vol. i. p. 
329), are found in the flints of the Diluvial Gravel; sometimes the 
cavities in the flints are lined with quartz crystals. 
Belemnites . —Silicious casts of the alveolar cavity of B. electrinus, 
denominated Callirhoe, (Parkinson’s Oryctology , p. 173), are of fre¬ 
quent occurrence in the flints of the Diluvial Gravel.— Org. Rem. 
vol. hi. tab. 8, fig. 15. 
Orthocera. — The Chambers of these fossils are sometimes found 
detached, forming a meniscus, having the sides highly polished. 
Ammonites. —Detached casts of the Chambers of these fossil Shells 
are named by Parkinson, Spondylolites. — Organic Remains, vol. hi. 
tab. 9, fig. 3. 
Palatal Bones. —Those denominated Bufonites, belonged to Car- 
tilagenous Fishes, of the Genus Anarhichas; they are of a dark brown 
or black colour, hemispherical, of a good polish, and are found in the 
Stonesfield Slate, Oolite, and Tilgate Beds. Figures of these are 
engraved in Organic Remains, vol. iii. tab. 19, figs. 6, 7, and 12; 
Smith’s Strata Identified, Forest Marble Table, figs. 7 and 8; and 
Mantell’s Tilgate Fossils, tab. 10, fig. 2. 
The leach-formed Palates occur in the Lias Beds and Limestone of 
Wiltshire and Oxfordshire; vide Organic Remains, vol. iii. tab. 19, 
fig. 15; and Smith’s Strata Identified, Forest Marble Table, fig. 10; at 
fig. 9, is shewn one of the rhomboidal Palates from the same Strata. 
In the Chalk Stratum are three different kinds of Palates, probably 
belonging to as many species of Diodon; the finest kind occurs in the 
Kent Chalk; they are oblong, about two inches by one and a quarter, 
and of a pale clay colour, sulcated on the surface with six or eight 
sulci.— Organic Remains, vol. iii. tab. 19, fig. 18. The next kind 
are found in Sussex, they are elliptical, having nearly equal sides, and 
about one inch and a half over; the grinding surface is a pale clay 
G 2 
