BRITISH AVONIAN CONODONT FAUNAS a 
Namurian conodonts were found in a borehole in a Yoredale type of deposit in the 
Cleveland Hills by Fowler (1944). Dunham & Stubblefield (1945) noted the 
occurrence of a platform conodont in the Colsterdale Marine Beds of the Millstone 
Grit of Yorkshire. Conodonts have also been noted in the Millstone Grit of the 
Midlands by Stevenson & Mitchell (1955). The only published systematic des- 
cription of British Namurian conodonts is that by Higgins (1961) who described a 
fauna from the Namurian of North Staffordshire. Collinson & Druce (in press) have 
described a conodont fauna from the lower boundary of the Namurian in County 
Clare, Eire. 
There have been no detailed systematic descriptions of British Pennsylvanian 
conodonts, but many workers have noted the presence of conodonts in the British 
Coal Measures. In Scotland, Currie, Duncan & Muir-Wood (1937) described 
conodonts from Skipsey’s Marine Band, and the Upper Coal Measures in Central and 
West Scotland. Manson (1957) listed conodonts from a marine band in the Anthra- 
conaia modiolaris Zone of Scotland. Smith (1907A) recorded conodonts from the 
Upper Coal Measures (above the Craigmore Ironstone). 
Stevenson & Mitchell (1955), Stubblefield & Calver (1955), Mitchell (1954) and 
Eden (1954) reported conodonts from the Midland Coalfields, as also have Mitchell & 
Stubblefield (1941) from the Leicestershire and South Derbyshire Coalfield, Mitchell, 
Stubblefield & Crookall (1942, 1945) from the Warwickshire and northern part of the 
South Staffordshire Coalfields, Edwards & Stubblefield (1948) from the Derbyshire 
and Nottinghamshire Coalfields, and Edwards (1954) from the Clown Marine Band 
in Derbyshire and Nottinghamshire. Earp & Magraw (1955) listed conodonts from 
the Tonge’s Marine Band in the Lower Coal Measures of Lancashire, and Magraw 
(1957) recorded conodonts from various marine bands in Lancashire, Derbyshire and 
Yorkshire. Ramsbottom (1952) and Woodland, Archer, Evans & Calver (1957) 
noted the presence of conodonts in the South Wales Coal Measures. 
There has been no reference to the occurrence of post-Pennsylvanian conodonts in 
the British Isles. 
(b) Carboniferous conodont zonation and correlation 
Although the Upper Devonian and Lower Carboniferous rocks of West Germany, 
the latter of which provide the standard for Carboniferous correlation, are tradi- 
tionally correlated on the basis of their cephalopod faunas, recent studies by German 
palaeontologists on the conodont faunas have shown that the latter offer a new 
degree of precision in problems of regional correlation. The most notable contribu- 
tions in this field are those of Bischoff (1955, 1956, 1957), Bischoff & Ziegler (1956, 
1957), Bartenstein & Bischoff (1962), Boger (1962), Kronberg, Pilger, Scherp & 
Ziegler (1960), Meischner (1962), Sannemann (1955, 1955A), Voges (1959, 1960), 
Walliser (1958, 1960) and Ziegler (1958, 1959, 1962, 1962A, 1962B). These workers 
described conodonts, which were associated with the classic Devonian and Lower 
Carboniferous cephalopod zones in West Germany, and a detailed Devonian and 
Lower Carboniferous conodont faunal succession has thus been established. 
