278 BRITISH AVONIAN CONODONT FAUNAS 
The completion of much of the present paper has also involved help from other 
sources which we wish to acknowledge. During 1965-66 F. H. T. Rhodes held a 
National Science Foundation Senior Visiting Scientist Fellowship at Ohio State 
University. The award of this Fellowship, and the warm hospitality provided by 
the Geology Department at Ohio State are acknowledged with deep gratitude, as 
is the typing assistance of Miss Emily Laws. 
R. L. Austin gratefully acknowledges the facilities and assistance provided at 
the University of Southampton during the past two years, and especially the con- 
tributions of Mrs. B. Gilkes and Mrs. A. Dunkley. 
The publication of the present paper owes much to the generous encouragement 
and help of Dr. H. W. Ball, Dr. W. T. Dean, Mr. E. F. Owen and Mr. H. G. Owen of 
the Palaeontology Department of the British Museum (Natural History). 
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