DAVIS : FOSSIL FISH EEMAINS. 
63 
occur sparingly in the Limestone of Wensleydale. The relation- 
ship of these peculiar ichthyodoralites is little understood. 
In conclusion — it may be drawn from previous observations, 
that the fishes occurring- most frequently in the thick-bedded 
lower limestone of other parts of the British Islands are absent or 
only represented by dwarfed specimens. The great spines of 
Ctenacanthus and Oracanthus are not present. The great teeth of 
I Orodus, most of the genera of the Cochliodonts, the large palates 
of Psammodus, and the teeth of the Petalodonts, have in each 
case become dwarfed and comparatively insignificant. They pre- 
sent the appearance of groups which have previously reached the 
cHmax of their existence and were gradually succumbing to a 
more or less unfavourable environment — with the advent of the 
coal measures they have almost entirely disappeared. 
ON THE LEAD VEINS IN THE NEIGHBOURHOOD OF SKIPTON. 
' BY J. EAY EDDY, F.G.S. 
Before directing attention especially to the subject of my paper, it 
is due to the Members to explain that it was first proposed that 
the Lead Veins in the Grit-beds of Craven should be considered, 
but ultimately the veins described by the present title were 
preferred. This change practically leaves me a somewhat barren 
subject, because the Cononley Lead Mine has been entirely 
abandoned for several years in the eastern part, and almost so in 
the western, and it is the only place near Skipton, where the regu- 
lar working of a vein has been carried on. 
A paper on the larger and much more interesting Mining field 
in Wharfedale may prove welcome on some future occasion when 
you may be inclined to extend your excursions to that district. 
The main vein is part of a large " fault," the throw of which 
has nevt^r been truly ascertained by the miner, partly because the 
sides have been rarely seen , and further on account of the disturbed 
