Page:Quarterly journal of the Geological Society of London, volume 9.djvu/309

1853.] merated by Prof. McCoy; they are few in number and peculiar. The slates that occur at the top of the Bala rocks in the neighbourhood of Llanfyllin and Meifod contain several species identical with those of Bala, but their fossil contents are not yet fully worked out. There are many Upper Silurian species, as already stated by Prof. Sedgwick, and occasionally Pentameriis ohlongus. Lastly, the Caradoc sandstone of Denbighshire, taken at three localities not far from Llanrwst, presents the following fossils:—

Calymene Blumenbachii. Strophomena compressa. Phacops caudatus. depressa. Downingiae. Atrypa reticularis. Beyi'ichia tuberculata. Rhynclionella micula. Holopella gregaria. borealis ? Mytilus unguiculatus. Chonetes sarcinidata. Clidoplioi'us ovalis. Spirifer plicatellus. Nucula levata ? elevatus. Leptsena sericea. Area Edmondiiformis. transversalis. Encrinite stems. Orthis elegantula. Favosites alveolaris. virgata ? Stenopora fibrosa.

These fossils are by no means characteristic of the "Caradoc sandstone of Shropshire" [now ascertained to belong to the Bala and Llandeilo group. July 1853], and, with few exceptions, are species found in Upper Silurian strata. Prof. Sedgwick formerly referred these beds, on fossil evidence, to the Wenlock shale (antea, vol, i, p. 21).

2. On the Occurrence of at .By Author:Joseph Beete Jukes Esq., M.A., F.R.S., F.G.S.

after the publication of my memoir on the Geology of the South Staffordshire coal-field in the 'Records of the School of Mines' (vol. i, part 2), I received a note from Mr. Daniel Sharpe calling my attention to the occurrence of Caradoc sandstone at a spot on the eastern border of the Walsall Silurian district. Being in the district for a short time in March last. I visited the spot indicated by Mr. Sharpe, and found to my surprise a quarry I had previously overlooked. It is a very old quarry, much overgrown by bushes and brambles, and in a field which was, I believe, covered by standing corn when I surveyed the district in 1849. From these circumstances, although I had passed within a few yards of it, it escaped my notice.

On visiting it this year, I was accompanied by Mr. George Eglinton, the occupier of the ground, who was aware of the peculiar character of the sandstone, and who also guided me to another very remarkable little section, near Hay Head, which had escaped my previous observation from the same circumstance of being overgrown by bushes, which in the summer would render it invisible. The first-named locality is a little south of the sixth milestone on the Birmingham and Walsall road, in the fourth field S.S.E. of Shustoke Lodge. The old quarry is just below the summit of a 