136 
TABULAR VIEW, ETC. 
SILURIAN. 
CAMBRIAN. 
LAUREN- . 
TIAN. 
UPPER 
SILURIAN. 
26. 
LOWER 
SILURIAN. 
2T. 
UPPER 
CAM¬ 
BRIAN. 
28. 
LOWER 
CAM¬ 
BRIAN. 
20 . 
UPPER 
LAUREN- 
TIAN. 
30. 
LOWER 
LAUREN- 
TIAN. 
EXAMPLES. 
Wenlock limestone and shale (p. 465). 
Woolhope limestone and grit (p. 46T). 
Tarannon shales (p. 468). 
Upper Llandovery, or May-hill'j Beds of passage 
sandstone, .with Pentamerusi between Upper 
oblongus, etc. (p. 468). ( and Lower Si- 
Lower Llandovery slates (p. 469). j lurian. 
Niagara limestone, with Calymene, Homalo^ 
notus, etc. (p, 479). 
Clinton group of America, with Penimnerus oblon¬ 
gus, etc. (p. 479). 
Silurian strata of Russia, with Pentamerus (p. 477). 
' British—Bal'd and Caradoc beds (p. 470). 
Llandeilo flags (p. 473). 
Arenig or Stiper-stones group (Lower Llandeilo of 
Murchison) (p. 475). 
1 Foreign—VnguMte or Obolus grit of Russia (p. 477). 
Trenton limestone, and other Lower Silurian 
groups of North America (p. 479). 
Lower Silurian of Sweden (p. 477). 
r British—Tremadoc slates (p. 483). 
Lingula flags, with Lingula Davisii (p. 484). 
Foreign —Primordial ” zone of Bohemia in part, 
with trilobites of the genera Paradoxides, etc. (p. 
487). 
Alum schists of Sweden and Norway (p. 489). 
Potsdam sandstone, with Dikelocephalus and Obo- 
lella (p. 489). 
f Menevian beds of Wales, with Paradoxides 
Davidis, etc. (p. 484). 
Longmynd group, comprising the Harlech grits and 
Llanberis slates (p. 485). 
Lower portion of Barrande’s “Primordial” 
zone in Bohemia (p. 486). 
Fucoid sandstones of Sweden (p. 489). 
Hnronian series of Canada? (p. 490). 
r ^Fundamental gneiss of the Hebrides ? (p. 
493). 
I Hypersthene rocks of Skye ? (p. 491). 
I Foreign —Labradorite series north of the river St. 
I Lawrence in Canada (p. 491). 
I Adirondack mountains of New York (p. 491). 
' British —Wanting ? 
Foreign—Bo.da of gneiss and quartzite, with inter- 
stratified limestones, in one of which, 1000 feet 
thick, occurs a foraminifer, Eozoon Canadense, the 
oldest known fossil (p. 491). 
