( ts > 
Courfe fall down ; and that where \X\q Strata had few 
or no Fihures, they remained entire, and fo formed thofe 
.very irregular Arches whidi are fo much wondered .at 
in thefe Places. Whether this be the true Origine of 
thefe Caves or not, I fubmit to thofe who (hall hereaf- 
ter have the^ Curiofity to examine. It feems more pro- 
bable to me, than what others have hitherto propofed. 
The three Rivers, as they are commonly called, in^ 
Peakes Hole are only fome Parts of the Cave deeper than 
the reft, and receiving all their Water from the Spring 
which comes from the farther End of the Cave. The 
Water which palTes through PooVs-hole is impregnated 
with Particles of Limeftone, and fo has incrufted al- 
moft the whole Cave in fuch a Manner, that it appears 
like one folid Rock. 
The more rare Plants which I obferved in the Peak 
are, 
Scartola JyheJris Angutllara, LaBuca fylv, 
murorum Jiore luteo J, B, On old Walls and about 
the Entrance into PeaPs-hole. It grows alfo in Hert-^ 
fordjhire,. I choofe to take Notice of it on this Oc- 
cafton, the rather becaufe M, V aillant has evidently 
iniftaken the Charaders of it in his new Diftribution 
of the Ckhoraceous T^rihe in the Memoirs of the 
Royal Academy oj SclencesAox the Year 1711. He 
there makes it a Species of LaBucaj from which it is 
very different on his own Principles. According to his 
Method, the Empalement of the Ladluca is fquamousy 
and the Dcfuon of the Seed fits upon a Pedicle. But this 
Species has z Jimple Empalement and z feffile Down, 
Thefe Charafters evidently diftinguifii it not only 
from La^uca, but from every Genus in his Method. 
I ftiall take leave therefore to conftitute a new Genus : 
» And 
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