section in association with other shells of the Chillesford series, such as Cyprina islandica, Mactra ovalis, Mya truncata, Tellina obliqua T. lata, and T. praetenuis, in sands resting upon beds of the Red Crag.
I have collected in these upper beds at Bawdsey cliff: —
Astarte compressa.
Cardita scalaris.
Cardium edule.
Cyprina islandica.
Lucina borealis ?
Mactra solida.
Mya arenaria.
Mytilus edulis.
Pecten opercularis.
Pectunculus glycymeris.
Tellina obliqua.
— praetenuis.
Nucula Cobboldia?.
Buccinum undatum.
Littorina littorea.
Nassa reticosa.
Natica catena.
— hemiclausa.
Trophon antiquum, var. contraria.
Turritella communis.
Sphenotrochus intermedius.
Vertebrae of fish.
Teeth of shark.
Claws of crab.
Owing to the presence of derived fossils, and the similarity of lithological characters of this division in the Red-Crag district proper, it will require special and careful search to determine its fauna in this area. Most of the shells are probably in common ; but the variation in physical conditions, independently of other circumstances, will be found, no doubt, to have brought in fresh species.
Fig. 19. — Section in Chillesford brick-pit.
Boulder-clay.
Chillesford clay with impressions of Shells.
Chillesford sand reposing on Red Crag.
These sands are succeeded by laminated grey clays, the lower parts of which are seen at Chillesford-Church pit, but are better developed at Chillesford brick-pit. The clay is there fossiliferous ; but the shells are all in the state of casts and impressions in the clay. The following species are recognizable : —
Arca. Leda myalis.
Cardium groenlandicum. Nucula tenuis.
Cyprina islandica. Tellina lata.
