List of Shells (continued).
Univalves. Upper Beds. Lower Beds.
Nassa - ?, sp. n. *
— incrassata vr r
— propinqua 2
Natica catena c c
— clausa vr
— groenlandica v r
— helicoides vr vr
Odostomia conoidea *
Patella vulgata vr
Purpura lapillus c vc
Ringicula ventricosa r
Rissoa semicostata r
Scalaria groenlandica r nc
— Trevelyana vr
Tornatella tornatilis r
Trochus tumidus r r
Trophon antiquum r c
— scalariforme †
Turritella communis ... nc c
— incrassata nc c
Velutina laevigata vr
Bivalves.
Anomia ephippium c r
— patelliformis r r
Astarte borealis c r
— compressa vc r
Cardium edule vc vc
— groenlandicum vr vr
Corbula striata c r
Cyprina islandica c vc
Bivalves. Upper Beds. Lower Beds.
Diplodonta astartea †
Leda lanceolata fr
— limatula c r
Lepton nitidum †
Loripes divaricatus r
Lucina borealis nc r
Mactra ovalis r vr
— solida c vc
— stultorum r
— subtruncata c vc
Mya arenaria c vc
— truncata c
Mytilus edulis vc vc
Nucula Cobboldiae vr vr
— tenuis vr vr
Pectunculus glycymeris vr
Pecten opercularis r vr
Saxicava rugosa r r
Solen siliqua r
Tapes texturata †
— virginea †
Tellina fabula †
— lata c vc
— obliqua vc vc
— praetenuis c vc
Thracia phaseolina r vr
Trigonella plana vr 1 or 2
Venus fasciata rr
Brachiopod.
Rhynchonella psittacea rr
Land and Freshwater Shells.
Bythinia tentaculata vr
Carychium minimum †
Helix hispida r
— pulchella †
Limnaea peregra vr
— palustris r
Paludestrina subumbilicata vr vc
Paludina lenta r
Planorbis complanatus †
— spirorbis vr
Pupa marginata †
Succinea putris †
Valvata cristata vr
— piscinalis vr vr
Cyclas cornea vr
Pisidium amnicum vr
Foraminifera.
Polystomella c c
Rotalia c c
Fragments of Balanus are common
in both beds. Spines of Spatangus and
small claws of Crab are scarce. Vertebrae and other small bones of fishes are
common in the lower bed and rare in
the upper one. Remains of Arvicola
very rare in either. Remains of Elephant and Mastodon have been quoted
from Bramerton, but they are very rare.
In addition to these, Mr. Harmer has found the Panopoea norvegica and Trochus zizyphinus in the lower bed, astarte sulcata, Abra alba, and nucula nucleus in the upper bed.
Postwick pit has long been noted for the occurrence of Rhynchonella psittacea and for the annelid- drilled surface of the chalk at the base of the crag.
- From a bank in a lane leading to Bramerton.
† These are from a small adjacent pit in Mr. Blake's grounds, in which Scrobicularia piperata (Trigonella plana) occurs in abundance.
