BRITISH AVONIAN CONODONT FAUNAS 253 
ELST S| 
AVONIAN 
| AAS A 
Lf i! HH 
Abundance factor - Total no.of specimens Total weight of 
Total weight of sample sample in kilograms 
Fic. 66. Continuation of the lithological section of the uppermost part of the Seminula 
Zone and Concretionary Bed in the Avon Gorge showing the abundance factor of cono- 
donts in each sample dissolved in acetic acid. Samples S 51-S 72 were collected from 
the riverside exposure (ST 562737). 
