25. Hard friable shelly limestone with numerous fossils, including _Dictyopleurus Haimi_, Dunc. and Slad.; _Akera_ aff. _striatella_, _Turritella carinifera_, _T. imbricataria_, _T. pharaonica_, _Alectryonia Clot-Beyi_, _Arca tethyis_, Oppenh., _Cardita_ aff. _carinata_, J. Sowerby, _C._ aff. _depressa_, Locard., _C._ aff. _triparticostata_, Cossm., _C._ cf. _gracilis_ and _depressa_, Locard., _Cardita fajumensis_, _Cucullæa_ aff. _crassatina_, Lam., _Exogyra Fraasi_, _Glycimeris_ (_Pectunculus_) _pulvinatus_, Lam., _Ostrea_ aff. _Reili_, _Spondylus ægyptiacus_, Bull. Newt., _Pecten solariolum_, May.-Eym., _P. moelehensis_, May.-Eym., _Qerunia cornuta_, _Euspatangus cairensis_, Loriol, _Linthia_ sp., _Anisaster gibberulus_, _Schizaster_ aff. _africanus_, Loriol; bryozoa ½ 26. Sandy clays with gypsum 7 27. Friable, gypseous, impure limestone with _Exogyra Fraasi_, _Carolia placunoides_, _Turritella_ sp., _Qerunia cornuta_, _Alectryonia Clot-Beyi_ ½ 28. Sandy gypseous clays 3 29. Friable sandy limestone with _Carolia placunoides_, _Exogyra Fraasi_, _Turritella_ sp. (The ruin of Qasr el Sagha is built on this bed) 1 30. Gypseous sandy clays with occasional oyster- limestone with _Qerunia cornuta_; ferruginous sandstone band, etc. 27 --- Total 154 --- Hard grey sandstone with _Zeuglodon_ and numerous _Carolia_, _Ostrea_, etc., in places, capping plain to south of Qasr el Sagha and forming the top of the “Birket el Qurun series.” The chief divisions of the series remain fairly constant and can be recognized and followed for many kilometres westwards.[61] The lower beds form the summits of Gar el Gehannem and the neighbouring hills (see Fig. 2 and section p. 36), the upper beds of the series being exposed in the higher escarpments to the north.