86 
THE AVONIAN OF THE AVON GORGE 
An Avonian Time-scale, Graduated by the Entrances of 
WELL-KNOWN CoRALS AND PrODUCTI. 
Producti. 
Zones, 
Sub-zones 
and 
Horizons. 
Corals. 
P. scahrictdus and P. costahis 
D3 
[Cyathaxonia rushiana] ^ 
6 
Zaphrentis aff. Enniskilleni 
P. longis'pinus 
D2 
Cyathophyllum regium 
Choneti- Productiis 
Lonsdalta and Acrophyllum 
Aidophylhim 
t)l 
Dibunophyllum and Koninckophyllum 
P. aif. giganteus 
Liiliostrotion irregidare and L. junceum 
P. corrugato-hemisphericus 
. 9 . 
Cyathophyllum Murchisoni 
P. aff. punctatus and P. aff. fimhriatus 
P, aff. hemispliericus 
Alveolites 
Carcinophyllum 
LITHOSTROTION 
P. cf. concinnus 
P. aff. pustidosus 
C 
Cyathophyllum 0 
Campophyllum 
7 
P. aff. corrugatus 
Z2 
Caninia 
Zaphrentis aff. cornucopice 
P. aff. semireticulatus 
Zi 
Michelinia 
P. cf. hurlingtonensis 
p 
Zaphrentis aff. Phillipsi 
K2 
P. hassus 
Ki 
Cleistopora 
^ Not yet recorded from the South-Western Province. 
