$. III. DIST. CHAR. Mode. 39 



. III. 



DISTINCTIVE CHARACTERS OF THE 

 RELIQUIA. 



ARE the characters used in describing and distin- 

 guishing these bodies ; and depend on their mode, 

 FORM (essential and accidental,) PROTOTYPE, sub- 

 stance, and soil. 



Obs. The essential FORM distinguishes reliqiiia 

 from other fossils. 



The essential FORM,, PROTOTYPE, and SOIL, cha- 

 racterize the orders (v. Syst. ) 



The essential FORM and PROTOTYPE, the genera, 

 species, and varieties. 



The SUBSTANCE, accidental FORM, and SOIL, the 



Mode. (Modus.) 



THE mode of extraneous fossils respects the state 

 or degree of mineral change, under which ihefor?u 

 of the original has been preserved. 



Reliquia retain the form of their prototype under 

 the more or less perfect conservation of the original 

 body, or under a general substitution of mineral 

 for organic matter. 



1. CONSERVATION (conser-vatio). In this 

 process the substance of the original is preserved 



