260 
ELEMENTS OF GEOLOGY. 
erous, and probably of estuarine origin. As some of these 
beds contain Cardita planicosta (Fig. 191) they have been 
Fig. 191. 
Cardita (J^eiiericardia) planicosta^ Lam, 
identified with the marine beds much richer in fossils seen 
in the coast section in Bracklesham Bay near Chichester in 
Sussex, where the strata consist chiefly of green clayey sands 
with some lignite. Among the Bracklesham fossils besides 
the Cardita, the huge Gerithmm giganteum is seen, so con¬ 
spicuous in the Calcaire Grossier of Paris, where it is some¬ 
times two feet in length. The Nummulites loevigata (see 
Fig. 192. 
Nummulites (Nummularia) Icevigata. Bracklesham. Dixon’s Fossils 
of Sussex, PI. 8. 
a. Section of the nummulite; 6. Group, with an individual showing the exterior 
of the shell. 
Fig, 192), so characteristic of the lower beds of the Calcaire 
Grossier in France, where it sometimes forms stony layers, 
as near Compiegne, is very common in these beds, together 
with A^ scabra and JV. variolaria. Out of 193 species of tes- 
tacea procured from the Bagshot and Bracklesham beds in 
England, 126 occur in the Calcaire Grossier in France. It 
was clearly, therefore, coeval with that part of the Parisian 
series more nearly than with any other. 
According to tables compiled from the best authorities by 
Mr. Etheridge, the number of mollusca now known from the 
Bracklesham beds in Great Britain is 393, of which no less 
