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ON THE IMPORTANCE OF AFRICA 
age at Mogara, in Egypt, only Tetrabelodon occurs, nor was it 
known till quite recently that Dinotherium had existed in any 
part of Africa. Last year, however, Mr. C. W. Hobley sent to 
the British Museum a fragment of a mandible with molars (see 
text-figure) which undoubtedly belongs to a small species of 
Dinotherium , closely similar to Dinotherium cuvieri, a species 
Portion of the lower jaw of Dinotherium hobley i. A From side with the 
outline of the whole jaw restored in outline. B From above, showing the 
crowns of the teeth. (About £ natural size.) 
found in the Lower Miocene beds of France. This specimen 
was collected by the late Mr. Botry Piggot at Karungu, near 
the south-eastern shore of Lake Victoria Nyanza, and is the 
first early Tertiary mammal recorded from tropical Africa. 
It is of the greatest interest because it proves the possibility, 
and even the probability, of mammalian faunas of various 
ages occurring in that region, and also shows that the separation 
