Publisher's Synopsis
Excerpt from Petrificata Derbiensia, Vol. 1
In the descriptive part of the work, the reader will perceive, my aim has been to apply to extraneous fossils the mode of investigation, happily established in Botany and Zoology. Hence, instead of giving a mere list of names, and these chie?y of species formed from entire genera or tribes of organic bodies I consider, in the first instance, every genuine or permanent fossil species to depend on a single recent one; and, accordingly, have endeavoured to fix the essential characters, by which it may hereafter be discriminated.
In arranging and describing petrifactions on this plan, I have unavoidably been led to use certain distinctive terms, which either do not occur in works of this kind, or not exactly in the sense in which they are here employed of these, it was at first my intention to have given an explanation in the present volume.
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