Buch 
Ferns (continued) and gymnospermous stems and seeds : [On the organization of the Fossil Plants of the Coal-measures. Part VIII] / by W.C. Williamson
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JPktl'. Trans. 1877. Plate 12

Willucmsoiv.

Fig-. 79

Fig.80

Fig . 85

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4 Js. v

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W. C. Williams on. Auto. Jnth.

Madure'fc Macdonald, Ldh. London

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