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WILLIAMSON (W. C.) On the Organization of the Fossil Plants of the 

 Coal-measures. Part VII. Myelopteris, Psaronius, Kaloxylon. 1876. 

 7 plates, $s. 



— - Part VIII. Ferns (continued), and Gymnospermous Stems 



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Part X. Examination of the supposed Radiolarians of the 



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Part XI. Lepidodendron, etc. 1881. 8 plates, 75. 6d. 



Part XII. Astromyelon, Psaronius, Zygosporites, Calamites, 



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Part XIII. Heterangium tillaeoides (Williamson) and Kalo- 

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Part XIV. The True Fructification of Calamites. 1888. 4 



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— Part XVI Lepidodendron, Rachiopteris. 1889. 4 plates, 3s. 



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Part XIX. Lepidodendron Harcourtii, etc. 1893. 9 plates, 



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 Organisation of Volkmannia Dawsoni from the Lower Coal- 



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WILLIAMSON and SCOTT. Further Observations on the Organisation of 

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WILLIS and BURKILL. Flora of the Pollard Willows near Cambridge. 

 1893. 8vo, 9d. 



WILLS (A. B.) On the Desmidieae of North Wales. 1881. 8vo, plate, is. 



WILSON (W.) BRYOLOGIA BRITANNICA, containing the Mosses of 

 Great Britain and Ireland, systematically arranged, being a third edition 

 of Hooker and Taylor's Muscologia Britannica. London, 1855. 8vo, 61 

 plates, cloth, £3 3s. 



with coloured plates, half morocco, gilt top, £5 55. 



WINCH (N. J.) Additions to the Flora of Northumberland and Durham. 

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WINCFI (N. J.) Botanist's Guide through Northumberland and Durham. 

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Contributions to the Flora of Cumberland. Newcastle, 1833. 4to, 



3s 6d. 

 WOOD (R.) Contribution towards a List of Cumberland Mosses. 8vo, is. 



Further Additions to the Flowering Plants of Cumberland. 1883. 



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WOODFORDE (J.) A Catalogue of the Indigenous Phenogamic Plants 

 growing in the Neighbourhood of Edinburgh, and of certain Species of the 

 class Cryptogamia. Edinburgh, 1824. i2mo, cloth, interleaved, 2s. 6d. 



WOODS (R,) Botanical excursion in Hamphire. 1848. 8vo, gd. 



WRIGHT (E. P.) Flora of the Islands of Arran. 1868. 8vo, gd. 



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