274 BRITISH AVONIAN CONODONT FAUNAS 
GROUP 
W 
a 
ie} 
= 
2) 
uJ 
= 
= 
UPPER 
Abundance factor = oe ate 2 Sueclene ts Total weight of sampie 
Total weight of sample in kilograms 
Fic. 90. Lithological section of part of the Upper Limestone Group of North Ayrshire : 
the Index Limestone to the Upper Linn Limestone, showing the abundance factor for 
each sample and the weight of each sample dissolved. For localities see p. 30. 
