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laminated beds, all belonging to the Lower Lias. Below these 
are the Rhetic Beds, some four beds of pale limestone above a 
thick layer of grey clay, banded limestone, and lastly at the base 
of the cutting the dark blue or black shales of the Lower 
Rhetic Beds. These descend beneath the level of the railway, 
within a little distance of the bridge under the road ; but further 
on they are faulted in such a manner that the basement beds of 
the Lower Lias, consisting of thick beds of argillaceous limestone 
and shales, are again upraised here and there, so as to display the 
White Lias at the base. 
East of the bridge, where the beds are thus faulted, the shaly 
beds of the Lower Lias yielded the tail bones of a Plesiosaurus in. 
admirable preservation and in complete order. The particular 
spot adjoined a fault that probably lowered the remaining bones. 
of the skeleton out of reach of the railway excavation. The 
Saurian, to judge by his bones, must have been from 15ft. to 
20ft. in length. Fossils in this cutting were rare, but iron-pyrites. 
again appear, this time in cubes in the solid limestone, and also- 
in veins and on the surface of the beds. 
Passing eastward, and bearing in mind that the cutting is now 
along the slope, parallel to the range of the hills, we find the blue- 
clays, limestones and shales of the Lower Lias exhibited. Several 
faults and disturbances occur, and in one place a band of limestone- 
occupies a vertical position. Approaching the bridge over the- 
lane where the railway again curves northward, the thick shale 
beds of the Lower Lias were again met. The strata abounded to. 
a very remarkable extent in Ammonites planorbis. So plentiful 
were they that in one instance a large slab of shale taken from 
the cutting was covered so thickly as to make it almost impossible. 
to put the point of a pencil upon it without touching an 
impression, and in some places they were lying many deep. The 
impressions themselves were scarcely indented in the shale, the 
original shell having been pressed perfectly flat. When first 
taken from the ground they had an iridescent appearance, after- 
