^{page 68 note 2} Abstract of a paper communicated to the Geological Society on January 21, 1874.

^{page 72 note 1} The work will be carried on under the direction of a Committee appointed by the British Association, which at present consists of Mr. Henry Woodward, Prof. Williamson, Mr. F. W. Rudler, Mr. L. C. Miall, Mr. W. Topley, Mr. W. Whitaker, Mr. G. A. Lebour, Mr. W. Carruthers, and Mr. Horace B. Woodward. The cooperation of geologists is earnestly desired. Copies of papers and Transactions of Local Societies will be gladly received by the Secretary to the Committee, Henry Woodward, Edit. Geol. Mag.