Pedwardine shales by lithological resemblance, stratigraphical position, and the occurrence of Liagulella Nicholsoni. The Pedwardine rocks are correlated with the Malvern Dictyonema shales by lithological resemblance, stratigraphical position, and the link of Dietgouvem sociale. The Shineton Shales are directly connected with the Malvern beds by lithological resemblance, stratigraphical position, and the occurrence of two species of Trilobites in IommonI and indirectly througe their correlatioe with the Pedwardine Shales, I think I may fairly conclude that the Dictyonema beds at Pedwardine and Malvern are representatives of the Shineton Shales.
The occurrence of Dictyonema sociale in the Shineton Shales at Pedwardine and Malvern furnishes another link in the chain of palæontological evidence. This species is common at the base of the Lower Tremadoc of North Wales, and helps to connect that formation with the Shineton Shales. Taken by itself, the occurrence of a single species may not be decisive; but, when other lines of evidence converge to the same point, this fact is of value.
The Black Shales of Malvern are correlated by their fossils with the Dolgelly group, the uppermost zone of the Lingula Flags.
It may be concluded from a review of the evidence that the Shineton Shales are at least as old as the Lower Tremadoc.
The Hollybush Sandstone.
Forming a continuous band between the Shineton Shales and the quartzite which rests upon the Wrekin, is a series of thin-bedded, migaceous, green sandstones, holding the same geographical relation to the Shineton Shales as the Hollybush Sandstone of Malvern holds to the black Olenus Shales. The identification of this rock with the Hollybush is placed beyond doubt by the further evidence of Kufaryine eiegnlate and Serpulites jistula, which occur in good preservation at Nevos Castle, at the south-west end of the Wrekin. The sandstone is also found at Lilleshall, five miles to the north-oast of the Wrekin, where it forms an inlier a mile long by a quarter of a mile wide. Since the reading of my paper I have also discovered it on the south-east dank of Caer Caradoc, near Church Stretton. It is well exposed in a quarry at the north-cast end of the hill, and contains a thin band of limestone with Kutorgina cinguluta, Serpulites fistula, and other fossils, and holds its normal place between the quartzite and the Shineton Shales.
Details of the Hollybush Sandstone as well as of the Shales will be found in my published paper.
Fauna.
I append a list of the Upper Cambrian fossils found in South Shropshire, most of which it will be seen are new to science. They are described and figured in my paper:—
Crustacea.
Asaphus (Asaphellus) Homfrayi, Salt, Shineton Shales,
Asaphus (Platypeltis) Croftii, Call. gen. et sp. Shineton Shales,
Agnostus dux, Call. Shineton Shales.
Conocoryphe monile, Salt. Shineton Shales.
