Of OXFO^R^D^SHlTiE. loj 
befidc, that thefrefli or falt-water can any where afFord us. Bac 
before I engage in this great controverfie, let us firft confider a 
few more of thefe fiones refemblingy^e//-/^^. 
7 1 . And firft, the above mentioned Conchites found in Horn- 
quarry, and reprefented in Tah.\. Fig. 8. which is not a 
folid ftone within (as all the Cockjc-Jiones hitherto dcfcribed have 
been) but hollow, and filled with y^<^r ; fomtimes fliot into ir- 
regular figures, but for the nioft part forked, as in Fig. 9. the 
hafis^ or place where the branches of the fork are conjoyned, be- 
ing rooted (in all that I have yet feen) at the commiffure or hinge 
of the vdves , and the branches extending thenifelves in the 
broader parts of the Conchites ; of which operation of Nature I 
can give no other account, but that it was firft obferved, by the 
Reverend and Ingenious xMr. Clark.-) Redor of Dreyton near Ban- 
lury^ from whom, befide other favors , I received many of 
them. 
72. After the hivalvular Cocklts found always with their 
valves clofed together, come we next to confider the other Bi- 
valves found never fo, but their nalves always apart. And fuch 
are the ftones refembling Efcallofs^ and fome other ftriated Con- 
chylia : whereof that reprefented Fig. 10. is the moft curious in 
its kind 1 ever yet faw, found in Heddington quarries by Mr. Ri- 
chard Stafley^ an ingenious young Man, and learned in thefe mat- 
ters, to whom I am beholding not only for this, but for fome o- 
ther choice ftones hereafter to be mention'd. Which amongft all 
the Felines or Efcallof-Jhells I could find in tht Idihyographers^ht^ 
refemblesthe Pe5Ien a/per of Aldrovandu^^, Of colour it is yel- 
lowifli, eared on both fides, the lineations from the commiffure to 
the rim of the ftone very prominent, and yet having fome o- 
ther tranfverfe lines (not bending to, but from the commiffure) 
ftanding upon them, and not pafiing through the deep furrows 
fo as to joyn with each other, 
73. As the tranfverfe lines do in the next following Pe5tinites^ 
Fig. II. where they are both of equal depth, and very fmall, 
thick and fine ; the tranfverfeVmes z\\ of them bent to the commif- 
fure., but the othery?ri<£ not meeting together in it, as in the for- 
mer and following Efcallops : This ftone is of a light reddifti co- 
lour, eared on both fides, and found in the quarries in the parifti 
of Heddington. i j-cHaceis, u. 3 . ca^. 6^. 
74. And 
