Zittel's Palæontology

IN the review of Prof. Zittel's "Handbook of Palæontology," which appeared in NATURE, vol. xiv. p. 445, it should have been stated, in connection with the occurrence of Radiolaria in pre-Tertiary beds, that Mr. W. J. Sollas, of Cambridge, met with specimens in coprolites from the Upper Greensand, some three or four years ago, vide Geol. Mag., 1873, vol. x. p. 272. Prof. Zittel duly records this fact in his paper on "Radiolaria from the North German Chalk," and mention of it was accidentally omitted in the concluding paragraphs of the review.