Chap. VL] LOWEE WENLOCK— IGNEOUS ROCKS. 109 
Hanter, fused the strata into huge amorphous masses, and left films of ser- 
pentine on the faces and joints of the altered limestone. 
Hanter. Worsel. Stanner Kocks. 
View prom Stanner Rocks (Worsel Wood, Hanter Hill, and Hergest Ridge 
BEING SUCCESSIVELY SEEN IN THE DISTANCE). (From Sil. Syst. p. 311.) 
Nearly all the fossils which have been found in the limestone of this tract, 
whether by Mr. Edward Davis, who discovered most of them, and specially as- 
sisted me in studying them, or subsequently by the Government Geologists, are 
true Wenlock and Upper Silurian forms. 
Some of these, such as the Trilobites Bumastus Barriensis, Phacops caudatus, 
and Encrinurus variolaris, with the Shells Leptsena laevigata and Acroculia pro- 
totypa, large Encrinite stems, and several Corals, are well-known published 
fossils of the limestones of Wenlock and Dudley * ; and in addition to these, 
even the Pentamerus Knightii has also been found, which, as will hereafter be 
stated, is a marked fossil of the overlying Ludlow formation. With these, 
however, two fossils have been found which usually belong to a lower horizon, 
— the Atrypa hemisphserica and Staurocephalus Murchisoni, the former being 
abundant in the Llandovery rocks, whilst the latter is even a Caradoc or Bala 
species. 
Lower Wenlock at Woolhope near Hereford, the Malvern Hills, May 
Hill, fyc. — Let us now consider the character of the lowest calcareous 
member of the upper Silurian rocks exhibited in the centre of the most 
symmetrical valley of elevation in the British Isles, or that of Woolhope 
in Herefordshire. There the limestone in question, as seen in the follow- 
ing diagram, forms the exterior coat of a central dome, c, in which the 
summit of the Upper Llandovery (May Hill) sandstone is barely visible, 
and from which the Woolhope limestone, d l , dips away on all sides, to pass 
* Sil. Syst. p. 313. 
