of OXFO'RS>'S H1%E. nj 
e^tceeding, fays Mr. /i^j; the balk of any Jbell-fifi nowWwmg in 
our feas. To which if it be faidthat moft fetnfi(;ntions are rriade 
either hy aggregation^ox by intriifion or protrufion of parts^ which 
always increafe the bulk of the [uhje^ : It may be anfweied, that 
though fuch augmentation muft be allowed indeed in many cafes, 
yet fure it did not fo fall out in the petrification of the Nepbiri or 
Cockl^-ftonezt Langhy^ where the y?om are much kfs than moft 
Natural /hells. 
no. Fifthly^ becaufe that even thofey?o;7£^, which fo exaftly 
rcprefent fome fort of fljell-fijb^ as Oyfters^ Cockjes^ i^c. that there 
can be no exception upon the account of figure^ but that they 
might formerly have been fliells indeed ; at fome places are found 
with only one Jhell^ and not the other. Thus in C ovpley-common 
we meet only with tht gibbou^^ and not the ^at ftiell of the petri- 
fied Oyjier^ and fo of the Efcallop-ftones in the Quarries near 
Shot-over ; which had they been once the fliells of Oyfters and 
Efcallops^ in all probability had fcarce been thus parted. 
111. Sixthly, becaufe I can by no means fatisfie my felf, how 
it iliould come to pafs, that in cafe thefe ftones had once been 
molded in fliells, fome of the fame kind fliould be found in beds, 
as the Conchites at Langley^ Char let on ^ Adderhury^ and others^ 
fcatter'd as at Glympton and Teynton ; and fo the Oftracites at Shot- 
over and Covpley. Nor how it fliould fall out, that fome of thefe 
Bivalvulars fliould always be found with their fliells apart, as the 
Oftracites and Felines : and others always clofed together, as the 
Conchites in all places I have yet feen. 
112. Laftly, becaufe many of iht^t formed ftones feem now to 
be in fieri-) as the Selenites at Shot-over and Hampton-Gay, the 
Conchites Glympton 2nd Cornwell-, where within one of the clay 
Ccc^/e^ above-mentioned, I found a little one of y?o;7e, not ex- 
ceeding a vetch inbignefs ^ which had they been formed hereto- 
fore by Cockje-Jhells^ in all likely hood would both either have 
been Stone or Clay. Nor can it be faid they were brought hither 
by different Floods, becaufe they were both found in the fame 
bed, one included in the other. Which is all I have to urge for 
this part of the Queftion^ but that in the Bifiopricko^ Hildefieim^ 
between Mjeld and Eimbec, there is a fort of Ochre that forms 
it felf in this manner into the fiafe of Oyffers ^: And that Mr. Ray 
* Topograph. Obfervations,^. 127. ^ Laehmu7tdi'0^vK'T9}^st:p.feCi, i. cap. 4. 
was 
