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7 plates, 55. 
Part VIII. Ferns (continued), and Gymnospermous Stems 
and Seeds. 1877. 12 plates, 7s. 6a. 
Part IX. Astromyelon, Calamites, Asterophyllites, "Uepido- 
dendron, etc. 1879. 7 plates, 6d. 
Part X. Examination of the supposed Radiolarians ox the 
Carboniferous Rocks. 1880. 8 plates, 10s. 
Part XI. Lepidodendron, etc. 1881. 8 plates, 75. 6d. 
Part XII. Astromyelon, Psaronius, Zygosporites, Calamites, 
etc. 1883. 8 plates, 75. Od. 
Part XIII. Heterangium tillaeoides (Williamson) and Kalo- 
xylon Hookeri. 1887. 4 plates, 2s. 
Part XIV. The True Fructification of Calamites. 1888. 4 
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2s. 
Part XV. Rachiopteris, Zygopteris, Calamostachys, etc. 1889. 
4 plates, 2s. 6d. 
Part XVI Lepidodendron, Rachiopteris. 1889. 4 plates, 35. 
Part XVII. Lyginodendron and Rachiopteris. 1890. 4 
plates, 35. 
Part XVIII. Bowmanites, Rachiopteris. 1891. 4 plates, 
2s. 6d. 
—- Part XIX. Lepidodendron Harcourtii, etc. 1893. 9 plates, 
55. 6d. 
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