Vol. 70.] MIOCENE OF THE VICTORIA STANZA, ETC. 161 



Thickness in feet. 



No. 28. Hard, buff- coloured, nodular sandstone. At Kachuku it 



becomes a coarse calcareous conglomerate Oh 



No. 29. Yellow argillaceous gravel, with intercalations of greenish- 

 grey clay or of yellow sandstone. It is a calcareous 

 gravel at Kachuku, containing Chelonian remains and 

 a fragment of a tusk 3 



No. 30. Conglomerate of rounded calcareous nodules (up to 2 feet 

 in diameter) in a calcareous cement, each nodule showing 

 concentric coats. It passes sometimes into a hard buff- 

 coloured sandstone, and forms a very constant horizon ... 2 



No. 31. (a) Upper part (beds i & ii), 4 feet. Grey clay, with 

 seams of sandstone and gravel, containing teeth of 

 Dinotlierium and bones of Anthracotheres (Brachyodus 

 etc.). 



(b) Middle part (beds iii-vii), 3 feet. Grey or brown 

 clay, with seams of reddish-brown marlstone containing 

 Ampidlaria ovata. At Kachuku it becomes a current- 

 bedded sandstone with a discontinuous seam of brown 

 marlstone, containing a Proboscidean scapula and the 

 mandible of a Carnivore (Pseudselurus africanusj (at 

 West Kachuku). 



(c) Lower part (beds viii-xv), 13 to 18 feet. Brown clay, 

 with inconstant seams of calcareous conglomerate in the 

 upper part. In the lower part it consists of grey clay 

 which yields Cleopatra bulimoides and Ampullaria ovata, 

 alternating with thin seams of current-bedded sandstone. 

 Eastwards this division becomes more arenaceous, until at 

 Kachuku it consists of two zones of lenticular beds of 

 gravel, separated by 4 feet of buff-cokmred current-bedded 

 sandstone. The Upper Gravel Zone is the chief 

 depository of bones of Dinotlierium hobleyi (mandible, 

 femur, humerus, tusk), bones of Anthracotheres, allied to 

 Hyopotamus (large humerus and tibia of Brachyodus, 

 mandible of Merycops, Merycopotamus, etc.), Rhinoceros, 

 a Carnivore (Pseudselurus africanus) and a Creodont, 

 giant tortoise (Testudo), Trionyx, crocodile, and Cerastus 

 cf. mcellendorffi. In the Lower Gravel Zone only 

 shattered Chelonian remains occur, and seams of traver- 

 tine become dominant. The base of this division is not 

 visible at Kachuku, although present at West Kachuku . 20-25 



No. 32. Dark-brown ferruginous marlstone yielding Cleopatra bidi- 

 moides, Ampidlaria ovata, and Lanistes carinatus. 

 Passes eastwards into a quartz -ironstone breccia, 3 feet 

 thick Of-3 



No. 33. Brown clay. At West Kachuku it is represented by a pale- 

 buff-coloured sandstone, with lenticles of travertinous 

 gravel 3| 



No. 34. Orange-coloured marlstone, with Ampidlaria ovata. At 

 West Kachuku it is represented by 6 feet of greenish-grey 

 clay with numerous seams of travertine I5 



No. 35. Brown clay 2 



No. 36. Brown sandstone. Nos. 33 to 36 are absent at South Nira 

 and Nos. 35 & 36 are represented at West Kachuku by 

 5 feet of orange-brown marlstone with seams of travertine. 0| 



No. 37. Mottled crimson and pale-yellow clay, traversed by a vein 

 of quartz. It is represented at West Kachuku, and even 

 so far east as the cliff of East Kachuku. At East 

 Kachuku Nos. 30 to 36 have thinned out, and at Kikongo 

 Nos. 30 to 37 are completely missing 11 



