prestwich ck ag-beds of suffolk and norfolk. Land and Freshwater Shells. 493 107. 104. 108. 3. 2. 3. 4. 7. 7. 8. 109. 108. 109. 9. 111. 10. 9. 6. 5. 6. 5. 112. Names of Species. Cyclas cornea Cyrena consobrina Pisidium amnicum Carychium minimum Helix arbustorum. ■ hispida plebeium ... pulchella ... Limnaea palustris peregra Paludestrina (?) pendula subumbilicata (?) terebellata .... Paludina lenta tentaculata Planorbis complanatus . corneus Synonyms and critical remarks. spirorbis Pupa marginata, Drapar- naud. Succinea oblonga putris Yalvata piscinalis . cristata Spbserium corneum Corbicula fluminalis, Mull. H. hispida, var H. rufescens, var.?... P. terebellata, var..., Hydrobia venferosa Mont. G. Bytbinia G-eograpbical Distribution. Europe, Asia .. Europe, Asia, N. Africa, N. America. Europe, Asia, N. Africa. Europe, Madeira Europe, Asia . . . N. America Europe, Asia, N. Africa. Europe, Asia, N. Africa, Madeira Europe, Asia, N. America. Europe, Asia . . . Europe, Asia . . . Asia Europe Europe, Asia . . . Europe, Asia, N. Africa. Europe, Asia, Iceland. Europe, Asia, N. America. Europe, Asia, N. America. Europe, Asia, N. & S. America. Europe, Asia . . . Europe, Asia . . . Localities in Red Crag. Wd Bt ..... B ..... W Wd Bt Bt W S WBt Wd Bt "... Bt Since the preparation of the Lists of Mollusca appended to my papers on the Coralline and Eed Crags, Mr. Alfred Bell has published, in the ' Annals and Magazine of Natural History ' for September 1870 and May 1871, considerable additions to the Crag-fauna. As regards the Mollusca, several had been previously communicated by him to Mr. Jeffreys, who examined the specimens ; these are incor- porated in the above lists. Others have not undergone the same revision. The names of all the species described by Mr. Bell as new are here subjoined, with the critical remarks of Mr. Jeffreys as to those of which he has examined specimens.
