[Footnote 13: Skeats, "Limestones from upraised coral islands," Bull. Mus. Comp. Zool. Harvard, =42= (1903), No. 2.] [Footnote 14: See generally W. Meigen, "Neuere Arbeiten über die Entstehung des Dolomits," Geol. Rundschau, =1= (1910), 49.] [Footnote 15: Skeats, "Origin of the Dolomites of southern Tyrol," Q. Journ. Geol. Soc., =61= (1905), 97.] [Footnote 16: Pfaff, "Beiträge über die Entstehung des Magnesits u. Dolomits," Neues Jahrb. für Min., Beilage Bd. =9= (1894), 485.] [Footnote 17: Garwood, "On the origin of the concretions in the Magnesian Limestone of Durham," Geol. Mag. (1891), 433.] [Footnote 18: Skeats, _op. cit._, ref. 15, p. 135.] [Footnote 19: J. J. H. Teall, "On dedolomitisation," Geol. Mag. (1891). 513, and Rep. Brit. Assoc. (1903).] [Footnote 20: J. S. Howe, "Geology of Building Stones" (1910), 353.] [Footnote 21: Hinde, "On Beds of Sponge remains in the south of England," Phil. Trans. (1885), Pt. 2, 427.] [Footnote 22: Sollas, "On the structure of the genus Catagma," Ann. and Mag. Nat. Hist., Ser. 5, =2= (1878), 361. Also _ibid._, 6 (1880), 447.] [Footnote 23: Cayeux, "Étude micrographique des Terrains sédimentaires," Mém. Soc. Géol. du Nord., =4= (1897), 443.] [Footnote 24: Jukes-Browne, "The amount of disseminated silica in the Chalk in relation to flints," Geol. Mag. (1893), 545.] [Footnote 25: Guppy, "Observations of a Naturalist in the Pacific: Vanua Levu" (1903), chap. xxv.] [Footnote 26: Rogers, _op. cit._, ref. 5, p. 403.] [Footnote 27: Judd, "On the unmaking of Flints," Proc. Geol. Assoc., =10= (1887), 217. Also Hintze, "Handbuch der Mineralogie," =1= (1906), 1473.] [Footnote 28: Grund, in Stille's "Geologische Charakterbilder," Heft 3 (1910).] [Footnote 29: Rullmann, "Handbuch der technischen Mykologie," =3= (1904-6), and refs. in Centralblatt für Bakteriologie (1904 and onwards).] [Footnote 30: Hinde, "Catalogue of Fossil Sponges," Brit. Mus. (1883), 28.] [Footnote 31: Rogers, "Geology of Cape Colony," ed. 1 (1905), 373.] [Footnote 32: _Ibid._, 357.] [Footnote 33: Lyons, "Libyan Desert," Q. Journ. Geol. Soc., =50= (1894), 534 and 545.] [Footnote 34: Victorian Naturalist, =27= (1910), 90.] [Footnote 35: Sorby, "Structure and origin of non-calcareous stratified rocks," Q. Journ. Geol. Soc., =36= (1880), Proc., 63.] [Footnote 36: Phillips, "Constitution and history of Grits and Sandstones," _ibid._, =37= (1881), 6.] [Footnote 37: A. Daubrée, "Geologie expérimentale" (1879), 256.] [Footnote 38: Phillips, _op. cit._, ref. 36, p. 26.] [Footnote 938: J. Barrell shows how wind-borne sand may form a covering to the dry and sun-cracked surface of a lake-deposit; "Relation between climate and terrestrial deposits," Journ. Geol., =16= (1908), 280.]