( i88 ) 
thefe Gkffopetra together, if ihey be net exaftly alike, 
fome hard, fome foft, fome incruftated towards the 
point, fome quit^ thro' ^ with every one a (pongious 
Root , where they are inferred into their proper 
Mufcle. 
His Adverfary had asked, Why the Black and Ajh co- 
loured ComhdB and Turhens^ are only found in the Chalk 
and Clay^ and not the White ones which are dag out from 
among the Rocks? To which he anfwers, That thofe 
which are found in the Chalk and Clay, are not true 
Turlens or Conchas , but Stones formed hke them : 
Whereas thofe that are found in Rocks are real Shells, 
which are enclofed and fo preferved in the Rocks. One 
Turlinites which his Adverfary bad fent to him, was a 
clear Evidence of this Matter. For it was molded with- 
in a Spiral Shell,which turned into it felf, as all the tur- 
binated Kind conftantly do, the inner Twh-ls of which 
Shell were preferved entire amidft the lapidecus matter, 
when the outward ones had been quite worn off \ from 
whence he poficively concludes that all thefe formed 
Stones, which feem to referable Teftaceous Animals of 
the turbinated and bivalvous kinds, were aftually caftia 
the real Shells of thofe Animals, and were never in 
another form befides that in which we now fee them. 
But 'tis objedted, Glojfopetra are natural ChryftalUza' 
ftons of Salt ; to which he makes this reply : That then 
the whole fubftance would be all of a piece. Salt would 
be Salt as well within as without; a Granate and a To- 
paz is a Granate and a Topaz throughout : Diamonds 
and Rubies are Diamonds and Rubies all over : they are 
aggregates of fimilar Particles which compoft the whole 
IMafe, be it greater, or be it lefs ; whereas thefe Gloffope- 
tr£ (c) like all oxh^t Vegetables^ are made up of va- 
rious and diffimilar Corpufcles, "put together in fuch a 
manner, as is peculiarly fubfervienttothe end for which 
they were made. Accordingly the Cortex is of one 
Sub- " 
