250 ON THE GEOLOGY AND STATISTICS 
CARDIGAN BAY BASIN. 
Having, as briefly as we could, pointed out some of the 
interesting peculiarities of the Menai Basin, as respects its 
general appearance, productions, animal, vegetable, and 
mineral, we now propose to hasten into the third, and re- 
maining basin, that of Cardigan Bay, which we observed, 
from the summit of Snowdon, to stretch toward the south- 
west; and, in order to enter it, we must cross over the 
south-west extremity of the Snowdon chain, by a pass two 
miles to the east of the Rivels, which, it will be recollected, 
are the termination of it to the south-west. In entering the 
Cardigan Bay Basin, we shall find, from the small portion 
occupied by the Carnarvon side of it, that little will remain 
for us to make the subject of observation ; as we shall find, 
in proceeding to the north-east end of the Carnarvonshire 
portion of the basin, which is formed by the hardest kinds 
of the slaty transition rock, that many of the remarks we 
made elsewhere on the effects they produce, are quite ap- 
plicable here. The south-west end of this side of the basin 
alone will require some little attention in its examination. 
The basin of Cardigan Bay, being much covered in its 
interior with the sea, the extent of land making up the re- 
mainder is necessarily limited. On its northern side, we 
have that portion of Carnarvonshire lying to the south of 
the Snowdon range ; on the east, a small range of moun- 
tains connecting the Snowdon chain with that of the Ber- 
wyn ; on the south, the Berwyn chain, a parallel one to 
that of Snowdon, commencing at Chirk Castle, in Denbigh- 
shire, and terminating at Sarny Booch, about ten miles to 
the south of Barmouth. They observe the same direction 
as the Snowdon chain, viz. from south-west to north-east, 
