^{page 322 note 1} In the Explanation of Plate XI, p. 272, the following corrections should be made: Fig. 3, for “wisp-like ferns” read “wisp-like forms”; Fig. 4, for “Phenolite” read “Phonolite”; for “magnification 40 in each case” read “magnification as indicated in each case”.

^{page 323 note 1} Plate XI, Fig. 2.

^{page 323 note 2} Adams, & Barlow, , The Haliburton and Bancroft Areas (Geol. Surv. Canada), 1910, p. 247.Google ScholarQuensel, , Bull. Geol. Inst. Upsala, xii, p. 145, 1914.Google Scholar

^{page 324 note 1} Gregory, J. W., Q.J.G.S., lvi, 1900, p. 223.CrossRefGoogle Scholar

^{page 324 note 2} Brögger, , Zeit. Krist., xvi, p. 30, 1890.Google Scholar

^{page 324 note 3} Pl. XI, Fig. 3.

^{page 325 note 1} Brögger, , Zeit. Kryst., xvi, p. 412, 1890.Google Scholar

^{page 325 note 2} Scott, , Min. Mag., xvii, p. 139, 1914.Google Scholar

^{page 326 note 1} Geol. Mag., 1913, p. 508; 1914, p. 485.Google Scholar See also Scott, , Geol. Mag., 1914, p. 319; 1915, p. 160.CrossRefGoogle Scholar

^{page 326 note 2} The American Quantitative Classification fails to observe this principle, and the result is somewhat unfortunate, particularly in Order 5 (Q/F or L/F < 1/7) which includes rocks that may contain felspars, or felspars with quartz, or felspars with felspathoids.

^{page 326 note 3} “Ueber Monchiquit, etc.”: Tscherm, . Min. Pet. Mit., xi, p. 445, 1890Google Scholar. See also Evans, Q.J.G.S., lvii, p. 38, 1901. Rosenbusch did not consider olivine to be an essential constituent (Elemente der Gesteinslehre, 1898, p. 233).

^{page 326 note 4} Williams, , Arkansas Geol. Surv. Ann. Rep., vol. ii, p. 107, 1890.Google Scholar