BIBLIOGRAPHY OF YORKSHIRE GEOLOGY. 
Ill 
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16 Duncan, P. M.— [See 1866]. 
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19 Hall, H. F. — Drift Sections of the Holderness Coast. 
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20 Lacustrine Deposits of Holderness. Ibid., pp. 38-48. 
21 Hughes, T. McK. — On the Break between the Upper and 
Lower Silurian Rocks of the Lake District, as seen 
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22 Kirkby, J. W., and J. Young. — Notes on the Remains of 
Chiton and Chitonellus from the Carboniferous Strata 
of Yorkshire and the West of Scotland. Ibid., pp. 
340-343. 
