[Footnote 68: It is not intended to convey the impression that remains of all these vertebrates were found at the point where the actual line of section runs. As a matter of fact at that particular point only _Palæomastodon_ remains were observed, while most of the others were obtained some distance further west. Remains of _Mœritherium_, probably identical with _M. Lyonsi_, of the Qasr el Sagha series, in the shape of a beautifully-preserved and almost complete skull, associated with _Palæomastodon_ and _Arsinoitherium_ in these same beds, I only discovered in January 1903, at a point nearly due north of the western end of the Birket el Qurûn. A preliminary description of this skull has been published by Andrews, _Further Notes on the Mammals of the Eocene of Egypt_; Geol. Mag. Dec. V. Vol. I. No III. March 1904, pp. 109-115.] [Footnote 69: ANDREWS and BEADNELL, _A preliminary notice of a Land Tortoise from the Upper Eocene of the Fayûm, Egypt_, P.W.M. report, Cairo, 1903.] [Footnote 70: In addition to those described from the Survey and British Museum collections, some additional species are described by von Reinach from von Stromer’s collection: _Schildkrötenreste aus dem ägyptischen Tertiär_; Sonderabdruck aus den Abhandlungen der Sendeenbergischen naturforschenden Gesellschaft, Band XXIX, Heft I. Frankfurt 1903.] [Footnote 71: Op. cit., p. 455-456. Vide Blanckenhorn, _Zur Kentniss der Süsswasserablag. u. Mollusken Syriens_. Palaeontographica XLIV, 1897, S. 97, t. 8, f. 2.] [Footnote 72: More recently Blanckenhorn in a paper entitled _Nachträge zur Kentniss des Palaeogens in Ægypten_, (Centralbl. f. Mineralogie ch. 1901, No. 9, p. 272) has named this species _Lanistes bartonianus_ (spelled _bartoninus_ in same paper).] [Footnote 73: It has 4-5 flat spiral rows, the uppermost of which on the last whorls is often more strongly developed but not keel-shaped as in _M. muricata_. There are longitudinal ribs to the number of 8-12 over the whorls; the largest example was 9 millimetres long and had 8 whorls.] [Footnote 74: See Note 2, p. 43.] [Footnote 75: The majority belong to the genus _Nicolia_, but more rarely specimens, apparently referable to a species of conifer, are met with.] [Footnote 76: The largest trunk noticed had a length of 28 metres.] [Footnote 77: ZITTEL, _Beitr. z. Geol. u. Palaeont. d. Libysch. Wüste_, I Th. (Palaeontographica, Vol. XXX) p. XCIII.]