[28] Grund, in Stille's "Geologische Charakterbilder," Heft 3 (1910).
[29] Rullmann, "Handbuch der technischen Mykologie," 3 (1904-6), and refs. in Centralblatt für Bakteriologie (1904 and onwards).
[30] Hinde, "Catalogue of Fossil Sponges," Brit. Mus. (1883), 28.
[31] Rogers, "Geology of Cape Colony," ed. 1 (1905), 373.
[32] Ibid., 357.
[33] Lyons, "Libyan Desert," Q. Journ. Geol. Soc., 50 (1894), 534 and 545.
[34] Victorian Naturalist, 27 (1910), 90.
[35] Sorby, "Structure and origin of non-calcareous stratified rocks," Q. Journ. Geol. Soc., 36 (1880), Proc., 63.
[36] Phillips, "Constitution and history of Grits and Sandstones," ibid., 37 (1881), 6.
[37] A. Daubrée, "Geologie expérimentale" (1879), 256.