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Among the Bracklesham fossils besides the Cardita, the huge Cerithium giganteum is seen, so conspicuous in the Calcaire Grossier of Paris, where it is sometimes two feet in length. Out of 193 species of testacea procured from the Bagshot and Bracklesham beds in England, 126 occur in the Calcaire Grossier in France.
The well-known Strombus luhuanus lives on sand among the reefs at Eagle Island. A Cerithium inhabits mud-flats at Port Molle and Pipon's Islets. Of the holostomatous gasteropods inhabiting the Littoral zone, the Naticae, mostly well-known species, were taken in sandy localities on the north-east coast, and the Neritae in the same province, mostly on rocks or reefs.
Rissoa Chastelii, Nyst, sp. Paludina lenta. Next below are fresh-water and estuary marls and carbonaceous clays in the brackish-water portion of which are found abundantly Cerithium plicatum, Lam. The lower fresh-water and estuary marls contain Melania costata, Sowerby, Melanopsis, etc. This bed contains a mixture of Hempstead shells with those of the underlying Upper Eocene or Bembridge series.
The upper division of this group consists in great part of beds of compact, fragile limestone, with some intercalated green marls. The shells in some parts are a mixture of Cerithium, Cyclostoma, and Corbula; in others Limnea, Cerithium, Paludina, etc. In the latter, the bones of reptiles and mammalia, Palaeotherium and Lophiodon, have been found.
From what we observed and heard we were very much inclined to be of their opinion. Cerithium Palustre is the scientific name of the shell in question; but I cannot pretend to decide the point. Shortly after this we reached Trincomalee. Few harbours in the world possess more beauty or are more perfect in their way than that of Trincomalee.
S.P. Woodward, are no longer inhabitants of the contiguous sea, as, for example, Strombus bubonius, which is still living on the West Coast of Africa, and Cerithium procerum, found at Mozambique; others are Mediterranean species, as Pecten Jacobaeus and P. polymorphus.
The Univalve Shells or Gasteropods of the Tertiaries embraced all the families now living, including land and fresh-water Shells as well as the marine representatives of the type. Some of the latter, as, for instance, the Cerithium, are accumulated in vast numbers. The limestone quarries out of which Paris is chiefly built consist wholly of these Shells.
I shall now proceed to treat of the third division, which is of Lower Miocene age. Nearly the whole of this Lower Molasse is fresh-water, yet some of the inferior beds contain a mixture of marine and fluviatile shells, the Cerithium margaritaceum, a well-known Lower Miocene fossil, being one of the marine species.
Cypraa scurra, Chemnitz. 38. Cypraa erosa, Linne. 39. Cypraa caurica, Linne. 41. Cypraa talpa, Linne. 41B. Cypraea lynx, Linne. 42. Cerithium tuberosum, Fabricius. 43. Strombus tricornis, Lamarck. 45. Strombus gibberulus, Linne. 46. Strombus floridus, Lamarck. 47. Strombus fasciatus, Born. 48. Pterocera truncatum, Lamarck. 49. Planaxis breviculus, Deshayes. 50. Nerita marmorata, Reeve. 51.
A Phasianella was dredged in from 3 to 5 fathoms on sandy mud, at Port Phillip, with Elenchus rutilus, Marginella fornicata, and Cerithium granarium.
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