OF THE CARDIGAN BASIN. 
251 
and extend fifty-four miles in length ; and, lastly, on the 
west, the basin opens into St George's Channel. 
That we may more readily describe this portion of the 
Cardigan Bay Basin, we shall employ the names of Efionydd 
and Lleyn, which have been given to the two districts into 
which this part of Carnarvonshire has been divided. The 
district of Lleyn occupies the south-western end, and that 
of Evionydd the remainder, or north-east portion. 
Evionydd, at its eastern end, is enclosed by the southern 
front of the Snowdon chain ; and from the hard, indestruc- 
tible character of the rocks in this direction, the country is 
wild, rugged, and rocky. The surface is rendered uneven 
by frequent small hills ; and in addition to these inequali- 
ties, it is often strewed with great boulders covering the 
ground. 
Lleyn presents characters very different. Being enclosed 
on the north-west by a low ridge of hills, a branch of the 
Bivels, or western extremity of the Snowdon range, is open 
to the sea on the south-west. As the rocks are decompos- 
able, a great portion of this district is covered with good 
soil; and the surface, less broken into inequahties, and 
with little or no obstruction from the rocks lying on the 
ground, is well adapted for tillage. 
The rivers which flow into Cardigan Bay from the Car- 
narvonshire side of the basin, are, with one or two excep- 
tions, (though numerous, small streams, descend from the 
higher grounds), of no great magnitude. 
The principal are the Llanystunduy, and the Glassin or 
Colwyn. 
The first enters the bay two miles to the south-west of 
Criccaeth Castle. Its banks are richly clothed in fine oak- 
timber. 
The other, the Glassin, after a course of above twelve 
miles, pours its waters into Traeth Maur marsli, and there 
