269 
BRITISH AVONIAN CONODONT FAUNAS 
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Ahunidance factor = Lota! no. of specimens 
the 
Fic. 84. Lithological section of part of the Lower Limestone Group in Midlothian : 
Bilston Burn Limestone, showing the abundance factor and total weight of sample 
dissolved for each sample. 
For localities see p. 30. 
