ORFHOCEEATID^. 
83 
Devonian Ststem in vakioits Counteies. 
j South Belgium 
i (Dewalque and Gosselet). 
Kalkstein of Etro- 
eungt with Cly- 
menicB and Spi- 
rifer Vermuili. 
Psammit of Con- 
dr 03 with Spirifer 
Verneuili. 
Cjpridinen-Schiefer 
of Famenne. 
Britain. 
Schiefer of Alatagne 
with Gon. primor- 
dial is a.r\A Cardiola 
retrostriata. 
Kalk and Mergel 
of Frasne with 
Bhijnch. cuhoides. 
Stringocephalen- 
Kalk of Givet. 
Calceola-Schiefer of 
Couvin. 
Pilton Group (iSpiW 
fer Verneuili- 
Zone). 
Petherwin Group 
{Clymenia - Lime- 
stone). 
lutumescens Lime- 
stone of Torquay 
and Chudleieh. 
Cultrijugatus- 
Schichten. 
Grauwacke of Hier- 
ges; Konglomerat 
of Burnot ; grauer 
Sandstein of 
Vireux ; Grau- 
wacke of Mon- 
tigny; Gedinnien. 
Plymouth Group in 
South Devon, with 
St rin yoccpha Ins. 
Ilfracombe Group 
in North Devon. 
Calceola shaly lime- 
stones of Ogwell 
House, Torquay, 
&c. 
Lynton Group. 
Sandstein andThon- 
schiefer with Pleit- 
rodictyum, Homa- 
lonotus. 
North America. 
& 
§ 
J 
-cT 
Catskill Group (Old 
Bed Sandstone 
with Holopty- 
chius). 
Chemung Group : — 
b. Chemung Zone. 
a. Portage Zone. 
Ilamilton Group : — 
c. Genesee shale. 
b. Hamilton shales 
1 
and flags. 
a 
a. Marcellus shale. 
E! 
Tapper Helderberg 
Group : — 
c. Corniferous lime- 
stone. 
b. Schoharie grit. 
1 
a, Cauda-galli grit. 
Old Ked Sandstone 
g2 
