266 A SYSTEM OF 



SECT. CCLXXX. 

 The SECOND ORDER. 



MINERAL-CHANGES, or the PETREF ACTIONS. 



Mitteralia-Larvata, vulgo Petfefacla\ 



Are mineral bodies in the form of animals or 

 vegetables, and for this reafon no others belong to 

 this order, than fuch as have been really changed 

 from the fu ejects of the other two kingdoms of 

 nature. 



There is more difficulty to determine the firft 

 point, viz. from when thefe bodies are to be 

 itiled petrefaclions, than from when they ceafe to 

 be fuch ; meanwhile I have, in order to make a 

 trial, confidered them in the following, manner. 



SEC T. CCLXXXL 



I. Earthy Changes, Terrx Larvat<e. Terrific at v & \ 

 A. Extraneous bodies changed into a lime 

 fubftance, or calcareous changes, Larvae cal- 

 careoe. 



j . Loofe or friable. Chalky changes, Cret<e 

 larvatte, 



a. In form of vegetables. 



b. In form of animals. 



I. Calcined or mouldered fliells, Hu- 

 mus conch aceus-i from the province of 

 Helfingeiand, at Uddevalla in the 

 province of Halland, and in the. 

 French fbrata of earth and chalk. 



2. Indurated, Petrefafta calcarea. 



a. Changed 



