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Spliorangiophores as a clue 



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On the occurrence of Sigil- 



6700 



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Lepidocarpon and the ( iym- 



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Smith, John Donnell. Undescribed 

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 (u-4251} 



Somerville, Alex. On the genus 

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Tansley, A. G. and Lulham, R. B. 



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• Siib-kiugdom Pteridophyta. 



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