VOL. XVI. (I) TOP-BEDS OF INFERIOR OOLITE 79 
district. That this is so in the latter district may be 
clearly seen in the main-road section at Midford, near 
Bath. 
It seems to have been discovered by one or two 
geologists that the Upper Coral-Bed at Midford is equiva- 
lent to the “ Coralline-Beds” at Dundry Hill, near Bristol, 
but there does not appear to have been any very definite 
statement to that effect. Nevertheless such is the case, 
and what is perhaps more important, the Upper Coral-Bed 
of Worgan’s Quarry, near Stroud, is on the same horizon. 
I had come to this conclusion some time before I sub- 
mitted to Mr Charles Upton specimens of clay from the 
Coral-Beds of Midford, and Timsbury Sleight, near Tims- 
bury, Somerset, with a view to seeing if they contained a 
similar fauna to the Coral-Bed, near Stroud. Mr Upton’s 
researches entirely corroborated the correlation founded 
upon other data. Witchell was apparently the first to find 
the Upper Coral-Bed at Rodborough Hill; but he thought 
it did not extend farther south than this. It was doubtless 
his failure to see in the “ Coralline-Beds” of Dundry the 
equivalent of the Rodborough Hill Upper Coral-Bed that 
led him into the error of correlating his White Oolite with 
the Dundry Freestone—a pre-Upper-Coral-Bed deposit. 
Mr Upton informs me that he had never been able to find 
the Upper Coral-Bed at Rodborough Hill; but with a know- 
ledge of where it should occur, gained by experience 
elsewhere, a very short time sufficed to locate it. It 
proved to be very similar to its equivalent at Midford, 
Timsbury Sleight, and Dundry—a whitish rock with an 
admixture of marly clay at the base, and containing 
numerous pieces of /sastr@a. The larger brachiopods, 
pelecypods, and echinoids, were of the same species as 
those found in the deposit elsewhere, and an examination 
of the micro-fauna demonstrated a remarkable correspon- 
dence in its case as well. 
