21 
Delf fragments of black cliert or hornstone occurred spar- 
ingly. The Eough Eock caps all the hills between the 
Wharfe and the Aire, and forms outliers above Keighley on 
both sides of the Worth. To the south-east it dips gently 
under the lower Coal Measures, of which a few outliers stud 
its surface. Only three or four of these outliers contain 
workable coals, as at Yeadon, Baildon, and near Denholme. 
Of the Lower Coal Measures I have so little knowledge 
from personal examination, that it will not be well for me to 
hazard any remarks on the subject. 
Few collections, whether private or public, have not a 
well-arranged suite of fossils from the Carboniferous Lime- 
stone, but the Millstone- Grit group rarely affords good 
specimens. We often have traces of Stigmaria and Lepido- 
dendron, and I have seen a very respectable fern from the 
Morton Banks Colliery. The shales frequently have traces 
of Goniatites, Aviculopecten, &c., but I have seen none worth 
keeping. In the bottom grit, near Skipton, I found a very 
obscure cast of Edmondia sidcata, an estuarine mollusc, also 
found on the saijae horizon in the Calder Valley. The Coal 
Measures are, I believe, more prolific, and perhaps if excavated 
and very carefully examined, some of the Millstone Grit 
shales would prove to be the same. Generally, however, the 
shales are sandy, and more or less porous, and the coarse 
sandstones, like modem gravel beaches and sand flats, are 
void of organisms, which would, if they ever existed, have 
been long since removed by the percolation of water. 
Kear Malham extensive mines were formerly worked in 
the rich deposits of calamine and galena occurring in the 
limestone near the Middle Craven fault.* In the debris I 
found quartz crystals, calcite, heavy spar, galena coated by 
oxidation with lead- sulphate, calamine, earthy and botryoidal, 
^ New workings have been commenced in these mines since the reading of 
this paper. 
