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(501) and E. Willl\mson. The Geology and Fossils of the Lin- 

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(5°5) ^ Monograph of British Trilobites. Part III., contain- 

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(509) Wyatt-Edgell, H. On the Arenigand Llandilo Groups. Proc. 

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(516) Kitchen-middens on the Great Ormeshead. Ibid. pp. 343, 



526. 



