47. Hard red clays 5 48. Grey and brown clays, sandy clays, and thin beds of sandstone with some silicified wood 19 49. Grey sandstones and loose false-bedded sandy clays with many silicified trees and remains[68] of _Arsinoitherium Zitteli_, Bead., _Palæomastodon Beadnelli_, Andr., _Mœritherium_ sp., _Phiomia serridens_, Andr. and Beadn., _Saghatherium antiquum_, Andr. and Beadn., _S. minus_, Andr. and Beadn., _Megalohyrax eocænus_, Andr., _Ancodus Gorringei_, Andr. and Beadn., _Pterodon africanus_, Andr., _Crocodilus_ sp., _Tomistoma africanum_, Andr., and large and numerous tortoises (_Testudo Ammon_, Andr.)[69] and turtles[70], and very rarely fragmentary fish-remains 5 50. Thin bands of limestone } } 51. Yellow sand-rock } } 52. Grey sandstone with fragments of bone (½ metre) } 25 } 53. Brown calcareous-grit (½ metre) } } 54. Light green sand-rock and sandstone } Approximate total thickness in metres 271 The specimens collected from Bed 15, on about the same horizon as the fossils mentioned from the locality 14 kilometres north of Qasr el Sagha, were examined by Blanckenhorn, who has published the following notice of them:— “I should first mention the fresh-water shells found by Beadnell in brown sandstone 1 kilometre north of Camp 19 (i.e. at Widan el Faras), which, in the absence of special literature on the Palaeogene fresh-water shells of North Africa and nearer Asia, I have compared with the fauna of to-day, in which I was most kindly helped by Professor v. Martens, Director of the Conchological Collection of the Natural History Museum. The greater number of the forms have a distinctly tropical, and more especially Central African, character. _Unio_ sp., small, related to the recent _U. Nyassænsis_ of Lake Nyassa. _Unio_, related to _U. Homsensis_[71] Lea, from Syria, and _U. Bonneaudi_ from Cochin China, with many radial folds behind the umbo which run obliquely from the blunt edge backwards towards the hinge-border. _Unio_, related to _U. teretiusculus_, Phil. (_Caillaudi_, Fer., _lithophagus_, Ziegli.) of the Nile. _Pseudodon?_ sp. _Mutela_ (a genus of tropical Africa) sp., long, with a straight finely-toothed hinge-border which very much recalls that of _Barbatia_ (a sub-genus of _Arca_). _Spatha_ sp. related to _S. dahomeyensis_ and _S. Droueti_ of Assinia in West Africa.