Page:Quarterly Journal of the Geological Society of London, vol. 27.djvu/185

 The " Clay with Pebbles " contains —

Cytherea despecta, Desh. A species new to the British Eocene.

Panopaea intermedia, Sow. —corrugata, Sow*

Pholadomya margaritacea, Sow.

Teredina personata, Lam.

Pinna affinis, Sow.

Pecten corneus, Sow.

Natica labellata, Lam.

—subdepressa, More.

Rostellaria lucida, Sow.

And teeth of Lamna and Otodus.

Of these species the Cytherea is found only in the zone of pebbles. The Panopoeoe continue their range upwards from the " Sands with Lingula " to a few inches (rarely a few feet) above the pebbles, all

Fig. 2. — Beds with Panopoeoe in position.

a. Stiff clay (J), b. Clay and Pebbles (H). c. Sands (G).

species occurring with their valves united, and in their natural position. It is curious that the Panopoeoe should have so long outlived that changed condition of the sea-bed which drove away their comrades in the " Sands with lingula"

Cyprina planata, Sow. Teredina personata, Lam.

Pecten corneus, Sow. Pholadomya margaritacea, Sow.

Pinna affinis, Sow. Turritella sulcifera, Desh.

Panopaea intermedia, Sow. Natica labellata, Lam.

Pectunculus brevirostris, Sow., var. Rostellaria lucida, Sow.

and very rarely a Nautilus occur in the " Clay with Cyprina."

A layer of crushed shells of Pinna, an inch or more in thickness, occurs at about two feet above the pebbles. The shells are so much decomposed that it is impossible to say whether they were whole when deposited.

Aporrhais Sowerbii, Rostellaria lucida, a Chrysodomus, and several species of Pleurotoma occur in the sandy clay (K), which forms the highest Eocene stratum exposed on the works.

sure that in the sands it can be distinguished from P. intermedia, Sow., unless by a difference in size.
 * Panopoea corrugata, Sow., is most plentiful in the pebble-bed. I am not