Bunbury, C. J. F. (47) On fossil plants from the coal formation of Cape Breton. Quart. Journ. Geol. Soc. vol. III. p. 423.
—— (61) Notes on a collection of fossil plants from Nagpur, Central India. Quart. Journ. Geol. Soc. vol. XVII. p. 325.
Butterworth, J. (00) Further research on the structure of Psaronius, a tree-fern of the Coal-Measures. Mem. Proc. Manchester Lit. Phil. Soc. vol. XLIII.
Campbell, D. H. (04) The affinities of the Ophioglossaceae and Marsiliaceae. Amer. Naturalist, vol. XXVIII. no. 454.
—— (05) The structure and development of Mosses and Ferns. New York.
—— (07) On the distribution of the Hepaticae and its significance. New Phytol. vol. VI. p. 203.
Carruthers, W. (65) On Caulopteris punctata, Göpp., a tree-fern from the Upper Greensand of Shaftesbury in Dorsetshire. Geol. Mag. vol. II. p. 484.
—— (69) On the structure of the stems of arborescent Lycopodiaceae of the Coal-Measures. Month. Micr. Journ. p. 177.
—— (692) On the plant-remains from the Brazilian coal-beds, with remarks on the genus Flemingites. Geol. Mag. vol. VI. p. 5.
—— (70) On the nature of the scars in the stems of Ulodendron, Bothrodendron, and Megaphytum. Monthly Micr. Journ. p. 144.