Errata and Addendum to Mr. Leonard Hawkes's abstract of paper read at British Association (see Geol. Mag. for October): p. 468, 1. 10, for Borganfjord read Borgarfjord; 1. 11, for Bernfjord read Berufjord; p. 469, 1. 8, for ice-scratched boulder read ice-scratched liparite boulder.

Errata in Mr. P. G. H. Boswell's abstract, October, pp. 466–7: §1,1. 5, for rise above 0.5 per cent read rise above 0.02 per cent, and (two lines lower) for 0.02 per cent read 0.5 per cent. § 3 : the opening paragraph should read: “as simple as possible ; the sand ought to contain only quartz.” In the next paragraph the fourth sentence should read : “The important supplies of glasssands occurring in Western Europe are all associated with planty material, Lippe sand occurring with rafts of braunkohle.” For the locality Hohenboka read Hohenbocka, and for Berrythorpe read Burythorpe.