X 
TABLE OF CONTENTS. 
CHAPTER Y. 
Llandovery Eocks (Transition from Lower to Upper Silurian). 
Page 
This Formation shown to be of intermediate character, containing both Lower 
and L T pper Silurian Fossils, with some peculiar Types. — Ascending order 
of the whole Group near Llandovery in South Wales, where most developed. 
— The upper portion alone exhibited in Radnorshire, Shropshire, Hereford- 
shire, the Malvern Hills, May Hill, Tortworth, the Lickey Hills, &c. — 
Tarannon Shales, or Base of the Upper Silurian in North Wales ... 85 
CHAPTER VI. 
Upper Silurian Rocks. 
General character of the Upper Silurian Rocks, as divided into the Wenlock and 
Ludlow Formations. — The Wenlock Formation of Shale and Limestone, 
with its chief Fossils, described in ascending order, from the Shale with 
Woolhope Limestone to the Wenlock or Dudley Limestone inclusive . . 105 
CHAPTER yn. 
Upper Silurian Rocks {continued). 
The Ludlow Formation, general character of. — Its Subdivision in the Typical 
Districts, into Lower Ludlow Rocks, Aymestry Limestone, and Upper 
Ludlow Rocks . 123 
CHAPTER VIII. 
Silurian Rocks of Britain 
Beyond the original Typical Region — namely, in Cornwall, the North-west of 
England, Scotland, and Ireland » 145 
CHAPTER IX. 
Organic Remains of the Lower Silurian Rocks 186 
CHAPTER X. 
Fossils of the Upper Silurian Rocks 215 
CHAPTER XI. 
The Old Red Sandstone, or Devonian Rocks, as exhibited in the British 
Isles 243 
