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Show 398 M. DEBHAYES'S TABLES OF SIIELLS. the species, or because the specimen examined was in rather an imperfect stale. The specific names of the tertiary fossil shells which have been found by M. Deshayes to belong to one period only, and for which he has not yet discovered any living analogues, are not given, as their enumeration would have required more space than could be allotted to such a subject in a treatise on Geology; but their aggregate number is included in the subdivisions of the column in the right-hand page headed' No. of species in each genus in the following localities,' and in the supplementary table, p. 46. APPENDIX I. TABLES OF FOSSIL SHELLS, BY MONS~· G. P. DESHAYES, Member of the Geological Society qf Paris, <joe. N.B. For a full explanation of the object of these Tables, and instructions as to the manner of using them, see the preceding four pages • • |