548 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



southern, coast of Sumatra, and the Maldives and Laccadives, on the 

 west of the Indian peninsula. As most of the species of the different 

 corals forming these reefs cannot exist in water beyond a certain 

 depth, the deep sea at present intervening between such widely 

 separated groups of islands would have formed an impassable barrier 

 to them ; and thus the conviction seems forced upon us that most of 

 these coral-reefs are now crowning the tops of the ancient mountains 

 of a subsiding continent, along the shores of which the various genera 

 of shells and other animals eoidd have migrated — as much as we are 

 impressed with the belief that the table tops of the Great Winterberg, 

 the Groot Tafelberg, the Twee Tafelbergen, and others previouslymen- 

 tioned (see sketch, fig. 17) prove the existence of the elevated plateau 

 that must at one time have occupied a large portion of Southern Africa. 



Table of Elevations from ElancVs Post (Kat River) to the Banls of 

 the Orange River, near Aliwal. Taken by Mr. A. N. Ella, Go- 

 vernment Inspector of Roads, and Mr. J. Graham, of Aliwal. 



Locality. 



Graham. 



Ella, 

 feet. 

 5332 



3432 



50G8 

 5596 

 4382 



4224 



Eland's Post, Kat Eiver 



Katberg, highest point of road . . . 

 Ditto, flat on the north side, near 1 



road J 



Whittlesea 



Q.ueenstown 



Klopper's Fontein 



Flat between Klopper's Fontein and ] 

 foot of Pen Hoek J 



feet. 

 2200 



4800 

 3100 



46o6 



4800 







4300 



5300 



Foot of Pen Hoek, Storniberg 



Summit of ditto, ditto 



Burghersdorp 



Aliwal 



Banks of Orange River, near Aliwal 



The flat around Bloemfontein, 1 

 capital of the Orange River, I 

 Free State 1 





Locality. 



Hall. 



Hall. 





feet. 



feet. 



The Great Winterberg is the cul- ' 





Gaika's Kop, 



minating point of the Kat and K 



7800 



6800 



Winterberg Mountains 







Hangklip is the culminating point 

 of the Andriesberg, an outlier 







6800 





of the Stormberg 



Lieut. Shorwell. 





Spitzkop or Compassberg is the 1 

 culminating point of the Storm- ■ 

 berg and Sneewbergen J 







10,259*. 









* Monts-des -Sources, in Basouta-land, is said to be the highest point in South 

 Africa ; but its exact height is not known. 



