Cardium edule.
Circe minima.
Corbula striata.
Cyprina islandica.
Leda myalis.
Lucina borealis.
Mactra ovalis.
— subtruncata,
Mya arenaria.
Mytilus edulis.
Nucula Cobboldiae.
Pecten opercularis.
Tellina lata.
— obliqua.
— prsatenuis.
Buccinum tenerum.
— undatum.
Conovulus pyramidalis.
Littorina littorea.
Natica catena.
Purpura lapillus.
Trophon antiquum.
Turritella communis.
Balanus crenatus.
There are also here found remains of
Platax Woodwardii.
Vertebrae of fish.
Mastodon teeth.
Raia antiqua.
Balaena vertebrae.
In the Museum of the Geological Society there is, amongst the specimens presented by Capt. Alexander, a rolled Coralline-Crag coral from Southwold.
There are pits at Henham and Yarn Hill, to the N.N.W. of Southwold, which yield a similar but poorer group of fossils from sand-beds which are also below the Chillesford Clay.
Fossils from Yarn Hill {including Mr. Fisher's list*).
Astarte borealis. Cerithium tricinctum.
Cardium edule. Littorina littorea.
Cyprina islandica. Natica catena.
Mactra subtruncata. — Guillemini.
— ovalis. Paludina lenta.
Pinna. Purpura lapillus.
Tellina obliqua. Ringicula buccinea.
— lata. Succinea oblonga.
— praetenuis. Trophon antiquum.
This completes the series of the Crag-pits in Suffolk. Those of Norfolk will be described in the next part of this paper.
Organic Remains.
It is evident that the organic remains of the Red Crag must be divided into two categories — the one of fossils proper to the formation, and the other of fossils derived from other formations. Generally the extraneous fossils of any deposit are few ; but in the case of the Red Crag they constitute a very important section and require a careful elimination. Mr. Searles Wood communicated a paper to the Geological Society in 1859†, in which he expressed an opinion that: —
53 species of Testacea
2 ,, Cirripedia were possibly derived from the Corraline Crag.
8 ,, Zoophytes
- Quart. Journ. Geol. Soc. vol. xxii. p. 26.
† " On the Extraneous Fossils of the Red Crag," by S. V. Wood, Esq., F.G.S. (Quart. Journ. Geol. Soc. vol. xv. p. 32).
