160 dr. f. Oswald ox the [June 1 9 14, 



Middle Series (Nos. 13-25). 



Thickness in feet. 



No. 13. Yellow-grey clay containing large plates of biotite ; it yields 

 Trionyx, Testudo, and Artiodactyls. Eastwards it becomes 

 greenish-grey, with a discontinuous seam of white or pink 

 calcareous concretions 5^ 



No. 14. Dull-red marlstone, travertinous in places. It becomes 

 greenish grey at Kikongo. It contains many casts of 

 Ampidlaria ovata (with opercula) and of Lanistes cari- 

 natus, as also Trionyx and other Chelonian remains. 

 This bed forms a very definite and constant horizon 0§— 1^ 



No. 15. Red or grey clay, with a marlstone like No. 14 in the upper 

 half, containing similar fossils, Artiodactylian (Prodromo- 

 therium) and Crocodilian remains. Thin layers of cal- 

 careous concretions in the lower half 5^ 



^No. 16. Grey sandstone, with a thin median seam of grey or red 

 clay. At Kachuku it contains mandibles of small Hyra- 

 coids (Miohyrax), Trionyx, crocodile, Am/pullaria ovata, 

 and Cleopatra exarata 1 



No. 17. Grey or red clay, passing down into grey sandstone which 

 contains (at Kachuku) crocodile, Trionyx, and Am/pullaria 

 ovata 1 



No. 18. Red and grey mottled clay, sometimes with thin seams of 

 sandstone or (at Kachuku, where it thickens to 3| feet) 

 of travertine 1 



No. 19. Grey sandstone with Ampidlaria ovata, passing down into 

 red clay which (at Kachuku) contains inconstant seams 

 of mudstone. The lowest bed at Kachuku contains 

 Chelonian and Crocodilian remains, together with Cleo- 

 patra exarata 2-3 



No. 20. Grey current -bedded sandstone passing down into red clay 

 with seams of travertine, containing Chelonian, Croco- 

 dilian, Rhinoceros, and Proboscidean remains 4-5 



No. 21. White, ciirrent-bedded, calcareous sandstone, becoming 

 argillaceous below, and containing Cycloderma victorise, 

 Ampullaria ovata, Lanistes carinatus, Burtoa nilotica ... 2 



No. 22. Pale-grey current-bedded sandstone, becoming gravelly 

 below. At Kikongo Nos. 21 & 22 are represented by 

 grey clay. At Kachuku the latter bed contains a large 

 Proboscidean tibia (perhaps of Dinotherium), Chelonian 

 remains (PodocnemisJ, and Ampidlaria ovata 2 



No. 23. Grey sandstone passing into conglomerate. At Kachuku it 



is markedly calcareous 0^ 



No. 24. Orange-coloured sand yielding teeth of Protopterus, croco- 

 dile, Dinotherium, small rodents (aff. Phiomys), etc., 

 overlying a greenish-grey clay with AmiKdlaria ovata 

 and Cleopatra exarata. At Kachuku this clay also 

 contains Achat inn. A thin travertine or travertinous 

 sandstone yielding Chelonian remains forms the base ... I5 



No. 25. Grey argillaceous gravel, overlying a red and grey mottled 



clay with Chelonian remains 2 



Lower Series (Nos. 26-37). 



No. 26. Buff-coloured, nodular, current-bedded sandstone, with re- 

 mains of Trionyx and crocodile 0g— 1 



No. 27. Grey, argillaceous sandstone, sometimes passing laterally 

 into a coarse gravel composed of pink gneiss, green an- 

 desite, quartz, jasper, and grey sandstone (from an older 

 bed); it contains fragmentary remains of Trionyx and 

 crocodile, with coprolites 3 



