*i80 ON THE GEOGRAPHICAL DISTRIBUTION 
Passing Leeds, to the north, the Sandstone Formation be- 
gins. (It contains, in the neighbourhood of Bramley, Wood- 
house, Chapehon, &c. many organic remains of vegetables: 
we have noble specimens of the Phytolithus verrucosus, 
parmatus, stellatus, striaticulmis, sulciculmis, cancellatus, 
imbricatus, and tessellatus.) The Sandstone Formation 
occupies an extensive district, by Otley, as far as Green- 
how Hill, where it meets the Compact Limestone: it then 
passes south, forming a range of alpine moors, by Ilkley, 
Keighley, and Halifax, to meet the range of the like for- 
mation dividing Yorkshire from Lancashire. Many of 
these heaths are of considerable elevation, as, Bardon Fell, 
1663 feet ; Draughton Moor, 1074 feet; Foxstone's Moor, 
1515 feet; Otley Chevin, 921 feet; Cow Rock Rumbles 
Moor, 860 feet. The rarer plants are, Botrychium luna- 
ria ; Osmunda regalis; Poly podium phegopteris, dryopteris; 
Aspidium oreopteris, aculeatum, lobatum, dilatatum ; As- 
plenium viride, ti'ichomanes, adiantum nigrum, ruta mu- 
raria, Blechnum boreale, Fteris crispa, Cyathea fragilis, 
Hymenophyllum Tunbridgense, and 80 Musci, all near 
Halifax : Veronica mon-tana, Scandix odorata. Narcissus 
pseudo-Narcissus, Pyrola media and minor, Prunus padus, 
Rubus id^us, chamsemorus ; Trollius europaeus. Geranium 
pyrenaicum, Epipactis latifolia, Crocus nudiflorus, &c. 
The moors, in general, are clothed with the three species 
of heath : the Empetrum nigrum, Vaccinium oxycoccos, 
and Vitis idaea, are also common ; the more elevated parts 
furnishing the Rubus cham^emorus, saxatilis, Lycopodium 
clavatum, selago, alpinum ; and, at the highest part, Ar- 
butus uva ursi. 
Retracing our steps to Greenhow Hill, and proceeding 
north-west, we come to the mountain district of Craven, 
chiefly consisting of compact limestone. Here we are pre- 
sented with many most magnificent scenes, equally pleasing 
