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ON THE OCCURRENCE OF FISH REMAINS IN THE LIMESTONE SHALES 
(yOREDALE) at CRIMSWORTH DEAN (hORSE BRIDGE CLOUGH), 
near hebden bridge, in the west riding 
of yorkshire. 
by edgar d. wellburn, f.g.s. 
Introduction. 
At the above locality a valley has been cut out across the 
dip of the strata — through the Kinder Scout or lower beds of 
the Millstone Grits and the underlying Limestone Shales (Yore- 
dales). A few years ago there was — in these latter bed.s — a good 
exposure of "Black Limestone," which had been cut through by 
the stream. At the present time, however, there is none of this 
limestone to be found, and this is unfortunate, as it was literally 
crowded with fossils in a beautiful state of preservation (Goniatites, 
Nautilus, OrthoceraSj Aviculopecten, (fee), and in rare instances 
fish remains were also found. Most of these latter, having found 
their way into private collections, have been — with the following 
exceptions — lost sight of. 
Description of Fish Remains. 
Sub-class : Elasmobranchii. 
Order : Ichthyotomi. 
Family : Cladodontidse. 
Genus: Cladodus Agassiz, 1843. 
C. mirahilis Agassiz, 1843. 
A specimen in the collection of Dr. Wheel ton Hind, F.G.S., 
shows portions of two teeth of this species, one being seen in 
impression. 
The teeth are of moderate size, the height of the central 
cones of the crown of the more perfect one being 10 mm. The 
