26 o a system O^F 
SECT. CCLXXX. 
The SECOND O R D E K. 
MINER ALXHANGES, or the PETREFACTIONS*. 
Mtneralia-Laruata^ w;lg6 Pet<refa5iay 
Are mineral bodies ia the fonu of animals or 
vegetables, and for this reafon no others belong to 
this order,, than fuch as have been really changed' 
from the fubjedls of the other two kingdoms of 
nature. 
There is-more difficulty to determine the firfl: 
point, viz. from when thefe bodies are to be 
ftiled petrefadtions, than from when they ceafe to 
be fuch ; meanwhile I have, in order to make a* 
trial, confidered them in the following, manner. 
SECT. GCLXXXL 
s. Earthy Changes, "Terrificata.. 
A* Extraneous bodies changed into a lime 
fubftance, or calcareous changes, Larva cal- 
carea, 
j. Loofe or friable. Chalky changes, 
larvata, 
a. In form of vegetables. 
In form of animals. 
I. Calcined or mouldered ffiells, 
mus conch aceus^ from the province of 
Helfingeiand, at Uddevalla in the 
province of Halland, and in the 
French ftrata of earth and chalk.. 
2 * Indurated, Petrefa^a cakarca, 
a. Changed 
