C 728 ) 
as luoft that are to begot, and feveral broken pieces of others. 
That which is perfeft,iS about the bigoefs of aWalInut,anfwer- 
ing CO W.Lifiers^ but without any inipreffion of a Trochite on 
it ; the top of it indeed is a little flat with a hole in ic , but it is 
withal very fraootb,withouj[ theleaft fign of a icdLy.jigricoU com- 
pares thefc ftones to a Wheel 5 and truly the body of it well re- 
fcmbles the Nave of a Cart or Coach, t he fiiape of ic being co- 
nical towards one end till you come juft to the top, where it is 
a little flat (as 1 faid) with a hole in it; and it has another hole in 
the middle of the broad end juft oppofite to this,very fit for an 
Axis io pafs thr@ugh ;and the five liollow flirts or fcer, iffuing 
fide- ways at equal diftances from the broad bottoiUjfomewhat 
refemble Spokes ; the faid flirts (landing about half an inch out 
from the body of the ftone, fo that it may not very improperly 
be called Modiolus quinque-radiatus; andat the endsof the flirts, 
where the hollows Ihould fliew themfelves , there grows after a 
very artificial manner a pretty large feam of the fame ftone juft 
over the middle of the hollow^ from the upper part of the ftirc 
to the lower part of it,parting the hollow in the middle, and 
covering about a third part of it 5 no: that this feam enters far- 
ther into the hollow than the mouth of ic 5' fo that the hollow 
of each flirt prefents it felf with two eyes: Hence it appears, 
that thofe flirts or feet were never longer than they are, and 
that no ftone ever grew to them ; and I think it hard to get one 
of thefe ftones fo perfeft as that I have , ic being very difficult 
for a Miner to fave thefe fore-feams, they being very obnoxious 
to the leaft injury. MuLifter fays, the feet were like Crefcents 
at the end, whereby I find the fore-feams of his Stones were 
broken ofF,as two of them are in mine.The flone feems wrought 
all over like the Fifli mentioned by Mr.Lifier, being composed 
of Trigonal, TetragonaljPentagonal and Hexagonal Places. The 
upper pare of the Conical end is wrought round with fix large 
Hexagonal places,and thefe reach half way the ftone ; then fol- 
lows a fecond round, made up of eleven Pentagonal plates,pret* 
ty large^and thefe reach almoft to the broad bottom, which is a 
little convex 5 the bottom it felf and feec contain Plates of alt 
makes, but moft of them are very fmall. This Stone is in fub- 
flance a whitifli opaque fluor , of the fame nature with the tro- 
chites 5 it has outwardly a rufty coat,and is blewifli within like 
fonje Sea-ftiells» When 'twas firft found 'twas full of a fort of 
aflicolour'd 
