Of OXFO%q).SHl\E. loi 
and furrows^ defcending as ir were from a center at the top, 
and expiinding themfelves to the of the ftone • having -alfo 
fix or fc ven tranfverfi fimpk lines ^ bent circularly to the hinf^e or 
comniiifureof the z/j/z/ei-, as in Tab. ^. Fig. 3. which is a fone 
without, of a dark cinereo:i^ colour, but within, ^ black fiint ; 
found fomwhere in the C hilt em about Henly upon Thames^ and 
kindly beilowed on me by tlie ingenious h\x.Munday^ Fhyfitian 
there. 
65. Some there are again, \rhofe// /.f alfo defceod from the 
hinge or commiflure, but not in firaight lines, but bent and un- 
dulated, and much broader than the former, as in Tab. 4, Fig a.. 
which though in magnitude it fall Oiort of the Concha Tridacna of 
Aldrovandus (fo called it fecnis becaufe they made three mourh- 
fuls apiece) yet in form it lliews to be fo very like, as may be feen 
alfo mjonftcn^ Tab. 13. that were it not a I mud pro- 
nounce it the fame'\ This I found at Great Rolvpright in a bhiilli 
clay, whereof, and of nothing elfe, itfeemsto be concreied ; 
for it do's not much exceed it in h?rdnef3, and ftill participates 
mofl: of that colour, though covered with a bright and fiiining 
fubjiance, by the Naturalids called Hoplites , or Armatura : of 
which more anon when I come to Qornu Ammonim^ a ftone, the 
moftof any adorned with that fubfiance, 
GG, Another fort there is found at Heddington Quarries, Mdiofe 
lines or firide are not drawn like the two former, from the com- 
milTureof the valves to rim^ but tranfverfly and circularly 
from one fide of the ftone to the other ; the lefler circles having 
place next the commijfure-i and the greater next to the rim of the 
ftone, '<x?>\\\Tab. \, Fig.<,. which feems much to refemble the 
Concha rugata of RondoletitM \ with vahes fwelling very high ; of 
colour it is cinereous, inclining to yellow, not hollow within, but 
a folid ftone^ and of much the fame texture with the rubble of the 
Quarry, 
67. Of the fmaller Conchites there are alfo feveral forts, differ- 
ing in colour ^lineation 2x1^ valves ; for at Try^z/o/z and about Bur- 
ford^ where they are found in the Fields, theyaremoftof them 
yellow^ with their valves rifing high and approaching to a round '^i 
but at GJympton^ where they are only found in a fpring that rifes 
^ Vid- Co7!cha?n tmbricatcim mhihnavi Ald' OVa-ndi. de TcH. llh. 3. cap. \%- ' Eondulct:us He tef^aceis^ lib- 1. 
cap. 2 y . * Thefe made red hot and put into drink, are accounted in ihis Country a prefent remedy for 
. a ftitcn. 
in 
