257 
partly because the number of recent South African antelopes available 
for comparison has been limited. 
One of the fossils is the posterior portion of the third lower molar 
of the left side, comprising the posterior pair of crescents and the heel, 
and belonging to quite a large animal. The crown is ([uite thick and 
covered with cement, while the enamel, where exposed by the removal 
of the cement, is seen to be thick, rugose, and much wrinkled on the 
surface. The talon is very large and of subtriangular shape, flattened 
on the inner, convex on the outer side. Among recent South African 
antelopes with which I have had an opportunity to compare this 
tooth, the closest resemblance is to Connochcetes, though the fossil 
is larger and at least specifically different from any of the modern 
species. 
The second specimen is a fragment of the left half of the lower 
jaw, with the first and second molars in place. The teeth have been 
so much abraded by water-rolling in sand and gravel that no identi- 
fication can be made. This is a much smaller animal than the pre- 
ceding one, and may have been one of the Gazelles, of which 
Antidorcas is the one most like the fossil. An apparent abnormality 
is the presence of a deep, cylindrical hole in the enamel of the external 
crescents of each tooth. In addition M. T is in an evidently diseased 
condition. 
PERISSODACTYLA. 
OPSICEROS, Gloger (ATELODUS, Pome]). 
The African Rhinoceroses are usually referred to the genus (or 
subgenus) Atelodus of Pomel, but, as Thomas has shown (1895), the 
latter name is long antedated by the term Opsiceros of Gloger, which 
should therefore be employed. 
In the collection the Rhinoceroses are represented by five loose 
teeth, all of the upper jaw, and derived from at least two individuals. 
There is considerable reason to believe that two species, both allied to 
the recent O. bicornis, are represented by these teeth, but it would be 
premature to recognise more than one until more complete and satis- 
factory material has been obtained. 
Opsiceros simplicidens, sp. nov. 
(Plate XVII., Figs. 3-5.) 
The type of this species is a second upper molar, evidently 
derived from quite a young animal, as it is not at all abraded, and is 
unfortunately incomplete at the base, so that its full transverse width 
cannot be determined. The tooth is very similar to M. 2 of O. bicornis 
in a corresponding state of development, but displays a number of 
differences, which are clearly of specific value. 
I. The tooth indicates a larger animal than the average of 
O. bicornis. 
KK 
