XII. MIOCENE.

Burdigalian* (Faluns of Bordeaux).

Gast. Melania aquitanica. Hydrobia acuta (in Mayence

Basin).

Helvetian (Faluns of Touraine and Anjou in great part;
Swiss Marine Mollasse).

Gast. Pleurotoma (numerous species). Conus antiquus. Voluta varispina. Helix turonensis (in Touraine).

XIII. PLIOCENE.

Lower Series (Sarmatian and Pontian of De Lapparent's Miocene System).

Lam. Panopoa Menardi (lowest beds). Venus multila,nella. Congeria (several species).

Placentian (Coralline Crag).

Polyzoa. Fascicularia aurantium. Eschara monilifera. Cellepora edax.

Brach. Terebratula grandis (an unusually large species; found also in the Lenham Beds). Lingula Dumortieri.

Lam. Pectunculus glycimeris (also found in the Lenham Beds). Astarte Omalei. Cardita senilis. Cyprina islandica

(also in higher Pliocene).

Gast. Turritella incrassata. Voluta Lamberti. Cassidaria bicatenata. Ficula (Pyrula) reticulata.

Echinoidea. Echinus Woodwardii.

*This term is due to M. Depéret; see De Lapparent, Traité de Géologie, 3me. éd., p. 1294.

Astian.

RED CRA G.

Lam. Pecten opercularis. Cardium Parkinsoni. Tellina obliqua. Mactra ovalis.

Gast. Buccinum undatum. Nassa reticosa. Purpura tetragona. Purpura lapillus. Natica multipunctata (and several other species). Trophon antiquum. Trophon contrarium (a common "left-handed" form).

NORWICH CRAG.

Gast. Turritella terebra (= communis). Trophon scalariforme.