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in Shropffiire, &c, many curious impreffions of the 
fern tribe in regular nodules of iron-fione ; and, in the 
latter place, not only impreffions of plants, but even 
the cones or iuli of fome kinds of trees are met 
with, very perfed and fair, and curioully imbedded 
in maffes of iron-ftone. 
The moft part of the impreffions of ferns, grades,, 
&c. are eahly recognizable, they fo minutely tally 
to the plants they reprefent. Others indeed, tho’ 
they do not exadly anfwer any known fpecies, yet 
have characters fo diftinCtly expreifed, that they are 
eahly arranged under their refpeCtive genera (i). 
Therefore I fhall not trouble your Lordffiip with any 
further remarks on all fuch, but ffiall only touch on 
thofe elegant and extraordinary impreffions, pro- 
bably of unknown vegetables, above-mentioned : for 
that they are the parts and impreffions of vegetables, 
I think clearly evinced, if we attentively and with 
a philofophical mind conhder them, and refleCt on 
the various circumftances, which attend them in the 
places, where they now lie buried. 
I have therefore the honour, my Lord, to exhibit 
the drawings of feven fuch extraordinary impreffions, 
and the foffiles themfelves, for your Lord ffi ip’s and 
this learned body’s infpeCtion ( See Tab. V.). The 
impreffion figured N°. i . is from Mr. Mytton’s col- 
lieries at Drilt, near Ofweftry, in Shropffiire ; as are 
alfo thofe figured N°. 2, 4, and 7 : they are found- 
(1) The celebrated Dr. Scheuchzer has arranged the foflile 
plants botanically, by Tournefort’s fyftem, in his folio work, in- 
tituled, Herbarium Diluvianum ; and Dr. Woodward’s foflile plants. 
Catalogue B, he informs us, were botanically coafidered and ar- 
ranged by thofe famous botanifts Dr. Plukenct, and Meff. Doody, 
Buddie, and Stoneftrcet. 
c feme*' 
