Page:Quarterly Journal of the Geological Society of London, vol. 27.djvu/716

 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 could 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 previously mentioned (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 Eland's Post (Kat River) to the Banks of the Orange River, near Aliwal. Taken by Mr. A. N. Ella, Government Inspector of Roads, and Mr. J. Graham, of Aliwal.

Locality.

Eland's Post, Kat River

Katberg, highest point of road. ..

Ditto, flat on the north side, near road

Whittlesea

Queenstown

Klopper's Fontein

Flat between Klopper's Fontein and foot of Pen Hoek

Foot of Pen Hoek, Stormberg

Summit of ditto, ditto

Burghersdorp

Banks of Orange River, near Aliwal

The flat around Bloemfontein, capital of the Orange River, Free State

Graham

feet.

2200

4800

3100

4600

4800

4300

5300

Ella.

feet.

5332

3432

5068

5596

4382

4224

Locality.

The Great Winterberg is the culminating point of the Kat and Winterberg Mountains

Hangklip is the culminating point of the Andriesberg, an outlier of the Stormberg

Spitzkop or Compassberg is the culminating point of the Stormberg and Sneewbergen

Hall.

feet.

7800

6800

Lieut. Sherwell.

10,259*.

Hall.

feet,

Gaika's Kop,

6800

Africa ; but its exact height is not known.
 * Monts-des -Sources, in Basouta-land, is said to be the highest point in South