[ 5 « ] 
Worm Stones, upon a Suppolition that thefe fofTi! 
Honeycombs, and all the other Kinds of Stones 
having regular fmall Cavities both round and ftel- 
lated like the fubmarine Corals, might be formed 
hy Earth Worms, which working many Paflages 
through the Matter whereof the Stone was afterwards 
formed, occations tho r e Di verifications in the Stru¬ 
cture of them : But this is far from the Truth ; for, 
was it fo, all the Perforations would be round, og 
at leaft approaching to a circular Figure ; whereas 
many of them are ftellated ; and there could not 
be that Regularity in the Pofition of the Cavities, 
as is to be obferved in thefe Stones, fince it is not 
to be fbppofed that Earth Worms make their Paf- 
fages in the Earth at any fixed Diftance one from 
the other, Thefe Kind of Stones are generally 
found in the Clay Pits both here and abroad. 
Our next Attention is claimed by a great Num¬ 
ber of foffil Shells which are preferved in this 
Room ; we muft make a few Remarks on thofe 
contained under each Title, 
Shells, as Foffils, are divided into three Clafies, 
i ft, Thofe that are found in their natural State 
without the Addition of-any other Matter, or the 
Change of their Subftance. 
2diy, Thofe that are petrified having the Shell 
full preferved. 
gdly, Stones in the Form of Shells, but without 
any Remains of the Pattern Shell which occafioned 
their having that Form. 
The feveral Kinds ot foffil Shells are as numerous 
as thofe that are recent, and are found in the Earth 
in moft Countries of the World, and in many Parts 
of England , particularly in the Mines in Eerbyjbire, in 
the Rocks at Beresford in Staffcrdjhire , at Aftonfield , 
in the fame County, and in great Abundance in Lm- 
cclnjhire 
