t)fOXFO%p^SHl%E. it; 



exceeding, fays Mr. Ray e the bulk of any Jhell-fifh now Jiving in 

 our fias. To which it it be faidthat molt petrifications are made 

 either by aggregation^ by intrufton or protrufion of parts, which 

 always increafethe bulk of the fubjeft : It may be anfwered, that 

 though fuch augmentation muft be allowed indeed in many cafes, 

 yet fure it did not fo fall out in the petrification of the Nephiri or 

 CockJe-fioneixLangley, where the fiones are much lefs than moil 

 Natural^e/Zy. 



no. Fifthly, becaufe that even thofe fiones, which fo exaclly 

 reprefent fome fort offiell-fijb, as Oyfiers, Cockles, (yc. 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/bell, and not the other. Thus in Cowley-common 

 we meet only with the gibbous, and not the flat (hell of the petri- 

 fied Oyfier, and fo of the Efcallop -fiones in the Quarries near 

 Shot-over ; which had they been once the fliells of Oyfiers and 

 Efcallops, in all probability had fcarce been thus parted. 



in. Sixthly, becaufe I can by no means fatisfie my felf, how 

 it fhould come to pafs, that in cafe thefe ftones had once been 

 molded in fliells, fome of the fame kind ftiould be found in beds, 

 as the Conchites at Langley, Charleton, Adderbury, and others, 

 fcatter'd as at Glympton and Teynton ; and fo the Oftr aches at Shot- 

 ever and Cowley. Nor how it ftiould fall out, that fome of thefe 

 Bivalvulars ftiould always be found with their fliells apart, as the 

 Ofiracites and Fettines : and others always clofed together, as the 

 Conchites in all places I have yet feen. 



ii2. Laftly, becaufe many of thefe formed fiones feem now to 

 be in fieri, as the Selenites at Shot-over and Hampton-Gay, the 

 Conchites zt Glympton and Cornwell-, where within one of the clay 

 Cockles above-mentioned, I found a little one of fione, not ex- 

 ceeding a vetch in bignefs ) which had they been formed hereto- 

 fore by Cockje-fijells, in all likelyhood would both either have 

 been Stone or Clay. Nor can it befaid 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 Quefiion, but that in the Bifiboprick^ Hildejheim, 

 between Mjdd and Eimbec, there is a fort of Ochre that forms 

 it felf in this manner into the ftape of Oyfiers f : And that Mr. Ray 



' Topograph. Obfervations,/>. 127. f LacbmaKdro^K^x"? ft&- J. citf. \. 



was 



