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out by the vefligU of the feveral fcts of Wy ers or branchej^ 
13. A piece where the joints arc un- equal in thicknefs. 
14. A piece with fome part of rhc Wyers yet adhering in their 
natural order at the biggeft end of the piece. 
1 5^ A thin-jointed pieces where note on the left fide a fingle Wyer 
accidentally preferved in its natural place,thoughrnapt afunder. 
1 6. A thick-jointed piece wirh a fee of Wyers m the middle of it. 
17. A good long piece of a Wyer^ and a fmgle joint thereof. 
So fdr HMr.Ltiler: To which we cannot but add lAv,Rays 
-Notes upon thefe very Obfervations. 
I was much taken, {faith he to Ux. Lifter) with your Obfervati- 
ons concerning theSrar-ftones, and informed in feveral particulars. 
For, although I had ofcen feen, and my felfalfo fometimes gather'd 
iDfthofe bodies ; yet I did never curioufly note the texture, parts 
and differences of them. As for their Origiml.'if you can allow the 
TrochitesdiVid Entrochi to have been fragments of Rock-plants, I fee 
nor, why you fliould make aiiy difficulty of admitting chefe to have 
been fo too ; the feveral intermdiA being alike thin in both, and the 
CommiflTures not much different; only the external figure doth not 
Gorrefpond. But it is to be confidered, that many of the Trochites 
have a pentagonous hole in the middle of them, which if we admit 
for the receptacle of the pith, it will be as hard to exemplifie fuch a 
figur'd pith,as fuch a figur*d ffalk in Land- plants. Your note con- 
cerning the Wyers fpringing out of the furrows or concave angles 
of (omG of the i^iemodia, and encircling the ftalk like the leaves of 
4fperuldoT equifetum,\vz$ fuYprKmgi^zvid feemsto meto argue thefe 
bodies to belong to ihtgenm of Vegetables 5 no iefs than Coral,Co- 
ralline,and the feveral forts of jP<?riifome of which are alfo jomted ; 
But novegetablejCitherof Land orSea,thatI know of,hathfiicii fre- 
quent joints and fliort or thin inter mdtii \ and fo they are things of 
their own kind, \v\\o^tf^ecies is/or ought we know, loft* If they 
were Vegetables, I guefs they were never foft ; but grew upon the 
rocks like Coral, and the other Stone-plants, juft now mention *d 5 
hard as they are. 
As for Equifeturs^'we know\that theLeavesof fome forts of it are 
jointed,as well asthe Stalk : Elfe I know no plant that hath jointed 
jeaves;except fome forts of Rujbgr aft^though thofe briftles of equi^ 
/2f/«wfurrounding the ftalk, neither thefe reputed leaves of Rpjb" 
grafs^cax\ properly be calFd Leaves,being rpund,and having no dif- 
ference 
