BlUTISH POSSIL SHELLS. 



The following living species are also found in a fossil state in drift and 

 strata of the British Isles. Tliej are all enumerated in Mr. Searles 

 Wood's monograph of the Crag MoUusca. 



The numbers refer to the species as figured in our Plates, llr. 

 Wood's nomenclature being inserted in italics when differing from 

 ours. 



Pl. I. Teredo 2. Pholas 11. Pholadidea 12. Gastrochfena 14, 

 as dubia. Saxicava 15, IG. Venerupis 18. Mya 19, 20. Panopea 

 21, 21* as Faiijasii. Corbula 22, 23 ? Sphsenia 25. Nesra 27. 



Pl. II. Poromya 1. Pandora 2, as inaquivalvis, 3, as pinna. 

 Thracia 7, 8. Solen, 13, 15. Solecurtus 18, as Macira stngUaia. 

 Syndosmya, as Ahra, 19, 22. 



Pl. III. Psammobia 1, 3, 4. Tellina 5, 6, 7, 9, as orala, 15, as 

 Balthica, 16. Scrobicularia 18, as Trigonella plana. Donax 19, as 

 vittatus. Mactra 20, 21, 22, as ovalis, 23, 25, 26. 



Pl. IV. Lutraria 2. Tapes 7, 8. Artemis 11. Venus 12, 14, 

 16, 17. Astarte 18, 19, 20, 22, as borealis. 



Pl. V. Cyprina 1. Circe 2. Isocardia 3. Cardium 6, 8, 9, 12, 13. 

 Lucina 14, as Loripes, 15, as Crypiodon flenmosum, 16. Diplodonta 19. 

 Clausina 20, as Cryptodon f. 



Pl. VI. Montacuta 1, 2, 3. Kellia 5, 6. Poronia 7, as KcUia r. 

 Cyclas 16, 18. Pisidium 23, 24, 25, 26. 



Pl. VII. Uuio 2, 3. Anodon 4. Modiola 6, 9, 10. Crenella 13, 

 14, 15, 16. Mytilus 18, 19, 20. 



Pl. VIII. Nucula 1, 5. Leda 6, 7. Area 9, 10, 11, as peciuncn- 

 loides. Pectunculus 13. Avicula 15. Pinna 16. Ostrca 17. Ano- 

 mia 18, 19, 20, 21. Lima 22, 23, 24. 



Pl. IX. Pecten 1, 2, 5, 8, 9, 10, 1], 12, 13, 1 !■. 



