544 G. W. Lamplugh — The Bridlington Shell-hed, etc. 



Postscript. — Since writing tlie above, the storms of this autumn 

 cleared the shingle from a small extent of beach near the town and 

 close to where the ' Crag ' was first found. This exposure showed 

 ' Basement Clay ' of the usual character, including in it one large 

 mass of clay and sand with shells, and closely adjoining another 

 similar mass of fine dark mud, without shells or stones ; and through 

 this there ran a short seam of peaty matter apparently of vegetable 

 origin. It is not improbable therefore that some of these shell-less 

 patches may be of fresh- water origin. 



Appendix A. — List of the Bridlington Shells published by Dr. J. Gwyn 

 Jeffreys, F.R.S., in Phillips' Geology of Yorkshire, 3rd ed. p. 274. 



Brachiopoda. 



1 Rhynchonella psittacea, 



Conchifera. 



2 Anomia ephippium, 



3 Pecten Islandicus. 



4 Mytilus edulis. 



5 ,, modiolus. 



6 Nucula Cohholdics, 



7 ,. tenuis; and var. inflaia. 



8 Leda minuta ; and var. huccata. 



9 ,, pemula. 



10 ,, limatula. 



11 Pechinculus glycimeris. 



12 Montacuta hidentata. 



13 Cardium Islandicum. 



14 ,, edule. 



15 Cardita horealis. 



16 Cyprina Islandica. 



17 Astarte sulcata ; and var. elliptica. 



18 ,, depressa. 



19 ,, horealis ; and var. Withami. 

 „ and monstr. mutahile. 



20 ,, compressa. 



21 Venus Jluctuosa, 



22 Tellina halthica. 



23 ,, calcaria; and var. ohliqua. 



24 Donar vittatus. 



25 3iactra solida ; var. elliptica, 



26 Thracia prcstenwis. 



27 Corbula gibba. 



28 Mya arenaria. 



29 ,, truncata. 



30 Saxicava Norvegica. 



31 ,, rugosa. 



32 Pholas crispata. 



Solenoconchia. 



33 Dentalium entale. 



34 „ striolatum. 



Gasteropoda. 



35 Lepeta caca. 



36 Puncturella noachina. 



37 Trochus varicosus. 



38 Littorina litorea. 



39 ,, rudis. 



40 Turritella terebra. 



41 ,, erosa. 



42 Scalaria Grcenlandica. 



43 Natica Islandica. 



44 „ Grcenlandica, 



45 Natica affinis ; and var. occlusa, 



46 „ Montacuti. 



47 Trichotropis horealis. 



48 Admete viridula. 



49 Purpura lapillus, 



50 Buccinum undatum. 



51 Trophon truncatus. 



52 „ clathratus ; a.ndva.v, Gunneri. 



53 ,, Fabricii. 



54 ,, later iceus. 



55 Fusus despectus ; and monstr. contra- 



rium. 

 Leckenhyi. 



curtus ; and var. expansa. 

 Spitzhergensis. 

 propinquus. 

 Sarsi. 



61 Columbella rosacea. 



62 Pleurotoma pyramidalis. 

 63 

 64 

 65 



56 



57 

 58 

 59 

 60 



66 

 67 



violacea. 

 elegans. 

 turricula : and 



and exarata. 

 harpularia. 

 Trevelyana. 



vars. nobilis 



Appendix B. — List of Foraminifera given by Dr. H. C. Sorby, F.E.S., 

 IN his paper on the Bridlington Crag, Proc. West Eiding of Yorkshire 

 GaoL. AND Polytechnic Soc. vol. iii. p. 559. 



Dentalina communis. 

 Lagena striata. 

 Polymorphina lactea. 



And undetermined species of 



Biloculina. 

 Guttulina. 



Quinqueloculina seminulum. 

 Pohulina calcar ? 

 Truncatuhna tuherculata. 



Nonionina. 

 2'riloculina. 



