Note AQ — Note VIII. Page 45. Zoophytes of the Chalk.
Reading edition
See 'Wonders of Geology,' 6th Ed., p. 610; 'Medals of Creation,' p. 273-276; and 'Geological Excursions round the Isle of Wight,' pp. 179-184, for an account of the silicification of these and other Zoophytes.