ORDOVICIAN BRACHIOPODA 155 



further collecting in certain localities by Mr T. R. Fry in the early stages of my 

 researches. The study is, accordingly, dedicated to his memory ; and whatever 

 worth its comprehensiveness may have is a tribute to his inspiring devotion to 

 Shropshire Geology. 



I wish to record my thanks to Dr W. T. Dean of the Geological Survey of Canada 

 who selflessly accepted responsibility for preparing a geological map of the Shelve 

 area from Professor Whittard's field sheets, and for spending so much time in 

 providing me with precise locations for nearly all the specimens in the collection. 

 The text has greatly benefited from discussions with Dr A. D. Wright and the 

 illustrations and statistical tables from the assistance of Dr Jean Graham, both of 

 the Queen's University, Belfast. I am also indebted to Dr V. Havlicek for sending 

 me specimens of Euorthisina and to Dr L. R. M. Cocks and Dr G. F. Elliott of the 

 British Museum (Natural History) for their help in a number of matters relating to 

 literature and the layout of the paper. 



VII. REFERENCES 



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 Andreeva, O. N. i960. Novye vidy drevnikh rasteniy i Bezprovochnykh S.S.S.R. [Markowskii, 



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 Bancroft, B. B. 1928. The Harknessellinae. Mem. Proc. Manchr lit. phil. Soc, 72 : 173-196, 



pis. 1-2. 



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1945- The brachiopod zonal indices of the stages Costonian to Onnian in Britain. /. 



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1879. Systeme Silurien du centre de la Boheme, 5. Classe des Mollusques. Ordre des 



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Bassett, D. A., Whittington, H. B. & Williams, A. 1966. The stratigraphy of the Bala 



district, Merionethshire. Q. J I geol. Soc. Lond., 122 : 219-271. 

 Bates, D. E. B. 1968. The Lower Palaeozoic brachiopod and trilobite faunas of Anglesey. 



Bull. Br. Mus. nat. Hist. (Geol.), London, 16 : 127-199, pis. 1-14. 

 1969. Some early Arenig brachiopods and trilobites from Wales. Bull. Br. Mus. nat. 



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Goryansky, V. 1969. Inarticulate Brachiopods of the Cambro-Ordovician rock of the north- 

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