mineralogy. 26 i 
M* Changed and filled with folld lime- 
ftone, 
, 1 , Tn form of animals. 
2. In form of vegetables. 
Found in the ifland of Gottland. 
Changed into a calcareous fpar, Pe- 
trefa^ia calcarea fpatofa. 
j . In form of animals. 
The fhells in Balfberget in the 
province of Skone. 
2. In form of vegetables 
SECT. GCLXXXII, 
sB. Extraneous bodies changed into a flinty 
fnbftance. Siliceous changeSj Larvae 
Thefe are like the flint, 
I. Indurated, Petrefa^a jiliem, 
.a, fChangedinto flints. 
S^iells and corals are indeed compofed of limy matter, 
even when their animals ftill dwell in them ; neverthelels, al- 
though they are not changed in regard to their principle, yet 
arc they reckoned among the petrefadions, as foon as the 
particles of the calcareous fubflance have got a new lituation ; 
i^Qr example, when they are become fparry, when they have 
been filled with a calcareous earth, either hardened or loofe, 
,£)r when they lie in the ftrata of the earth. Thefe form 
the greareft part of foffil colleftions, which are fo induftrioufly 
made, often without any regard to the only and principal ufe 
they can be of, viz. that of enriching zoology, Mineralifts 
are fatisfied with feeing the poffibility of the changes the lirtie- 
^.one undergoes in regard to its particles, and alfo with re- 
ceiving fome inlight into the alterations which the ^arth has 
been fubjcdl to, from the llrata which are now found in it. 
The calcined fliells, oi- thefe which have been changed into 
limy and chalky matter, are fit to make lime, and are Hill 
more ferviceable as a manure. The indurated ferve only to 
make grottos. No gypfeous petrefadions are known, if fuch 
are not found in the Perfian alaballer ; for Mr. Chardin fays, 
that hehas fecn a lizard included in that Hone. 
S3 I. Carnclians 
