Note 42 — PART III.
Reading edition
Blanckenhorn, Neues zur Geologie und Palæntologie Ægyptens (II. Das Palæogen) Zeitschr. d. Deutsch. Geolog. Gesellschaft, Jahrg. 1900, p. 446, has determined this as T. tenuistriata. He refers to these beds as corresponding to the Tafla of Jebel Mokattam, but I regard them as probably representing a considerably lower horizon.