Vl PREFACE. 



The map has been re-drawn on a larger scale ; 

 with the work done by the officers of the Geo- 

 logical Commission has been incorporated the 

 information collected by A. G. Bain, A. Wyley, 

 R. Pinchin and E. J. Dunn, while the Rev. S. 

 S.- Dornan very kindly gave us a sketch map of 

 the geology of Basutoland, the result of many 

 journeys made during his missionary work in 

 that country. 



To our former colleague on the Geological 

 Survey, Prof. E. H. L. Schwarz, we owe our 

 thanks for the photographs reproduced on 

 Plates XXIII. and XXIV., and for the view on 

 Plate XIV. we have to thank Mr. E. H. Short 

 of the Cape Railways. 



Dr. R. Broom has again very kindly con- 

 tributed a chapter on the vertebrate fossils from 

 the Karroo formation, as well as help in the 

 names and localities of many fossils. 



A. W. ROGERS. 

 A. L. DU TOIT. 



