380 
Of the above species, only those marked by an asterisk are 
common to the Cotteswolds and Dundry—a great contrast to 
what obtains between Dundry and the Dorset area. 
These facts concerning the distribution of Ammonites and 
Brachiopoda in these areas shew us that there was a very fair 
connection between Dundry and the Dorset-Somerset area ; that 
there was, during a certain time, a poor connection between the 
Cotteswolds and the latter area, or possibly none at all; and that 
there was no connection between Dundry and the Cotteswolds 
at that time. 
Such being the conclusions which we may deduce from 
these facts, it is the object of these pages to shew, how Dundry 
could have been thus entirely separated from the Cotteswold 
range—when, in fact, this state of things commenced, and when 
it terminated; and it will then be seen that, strictly speaking, 
Dundry is no outlier of the Cotteswold Hills in the same sense 
as Cam Down, Robins Wood Hill, Churchdown, Bredon, etc¢., 
because during the deposition of all its strata—except perhaps 
a small portion of the top—it had no direct connection with 
the Cotteswolds. On the other hand it was connected directly 
and actually, by way of the Bristol Channel, with the Dorset- 
Somerset—area, a part of the Anglo-Parisian basin; and it 
should be more correctly described as the northernmost outlier 
thereof, although it is so much further distant from any of the 
present existing strata of that basin. 
A glance at a geological map will shew us that Dundry is 
almost entirely surrounded by strata of the Carboniferous 
Period. To me it seems probable that, during the deposition of 
the Keuper Marls, the Dundry area was a small landlocked bay 
having no connection with outside, except by way of Congres- 
bury and Weston-super-mare. When that subsidence of land, 
which led to the incursion of the Lower-Lias sea, occurred, it 
possibly brought about free communication between the various 
areas; and the similarity of the Liassic Ammonite-Fauna 
in all the districts proves that such was the case. But at 
some period subsequent to the deposition of the Lower Lias,* 
* This is shewn by the beds of Lias being upturned in the neighbourhood 
of Purton Passage. I am indebted to the President for this information. 
