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114 BALA FOSSILS FOUND IN THE NEIGHBOURHOOD 
Bala are of the same age, because they appear to occupy corres- 
ponding positions, but there is no satisfactory fossil 
justify this conclusion. The most characteristic 
Hirnant limestone at Bala are absent in the uppe 
Glyn Ceiriog, and the most characteristic fossils 
Glyn Ceiriog upper limestone and associated shales 
in the Hirnant limestone. Any species common to both may 
be found in all the zones. 
Some of the species found in zone z give it a Lower L 
dovery character, but true Pentfameri are never found in it. 
CHIEF FOSSIL LOCALITIES. 
The names of Localities will be easily found on the Ordnance Map. 
A.—Berwyn Phosphate Mine, S.E. of Bala, situated near Trwyn 
Swch at the head of the Llangynog Valley in the 
Berwyns. Fossils at Mine. 
B.—Blaendinan near Llandrillo, W. of Corwen. Fossils in the 
loose stones and rocks near the little brook where the 
Bala limestone crosses the mountain road. /, 
C.—Brynbedwog, S. of Bala lake. Fossils abundant in the 
rocks and walls about the farmhouse. 
D.—Bryn-cut at Rhosygwaliau, S.E. of Bala. Fossils in the 
rocks on the roadside nearly opposite the vicarage. » 
E.—Bryntirion, about a mile W. of Corwen. Fossils in the 
wood above the road, where there are several quarries. / . | 
F.—Bryngwyn, S. of Bala Lake. Fossils in the old lime quarries 
and wall where the limestone crops out on the hill side. 
G.—Bwlch-y-gaseg, S. of Corwen. Fossils in the loose stones 
and outcrops of rock along the mountain road leading 
from Cynwyd to Moel Ferna. ~*~,” © 
H.—Bwlch-hannerob, S.E. of Bala. Fossils in the Hirnant 
zone near the farmhouse, and in the wood down to the 
River Dee. 
I.—Cefn-y-Coed at Glyn Ceiriog, S. of Llangollen. Fossils 
along the lower limestone outcrop, and especially in the 
quarries above Dolhir. 5 
J.—Cerig Coedog, S.E. of Corwen. Fossils along the rocky 
ridge S. of Moel Ferna, where the boundary divides the 
counties. Several zones here. 9° & 
