By the term ‘classical rhinoceros’ I mean the rhinoceros which was known to the Greek and Roman world during the five and a half centuries between 300 B.C. and A.D. 250, which was shown from time to time at Alexandria under the Ptolemies and later on appeared regularly in the arena at Rome taking part in fights with other beasts and with men. Although the Indian rhinoceros seems occasionally to have been exhibited at Rome, at any rate in the early years of the Empire, I believe that the rhinoceros usually shown there came from Africa, and I have tried to analyse such evidence as is available to show firstly what species it was and secondly what part of Africa it came from.There are, of course, two quite distinct kinds of African rhinoceros, the square-mouthed and the prehensile-lipped, popularly known respectively as the White and the Black Rhinoceros. Until recently their scientific names were Rhinoceros simus and Rhinoceros bicornis, but systematists have now separated them into two genera, calling the former Ceratotherium simum and the latter Diceros bicornis ; denying to both the title of Rhinoceros which they reserve for the Indian rhinoceros and its near Asiatic relatives. For the sake of simplicity and brevity I shall retain the old names and call them simus and bicornis.The popular misnomers of ‘white’ and ‘black’ are a legacy from the South African Dutch of the 17th century, who called simus ‘wit renaster’ and bicornis ‘zwart renaster’. They were not very particular about exact shades of colour and probably meant no more than that one species usually appeared much lighter than the other. The natural colour of both appears much the same to an observer a little distance away. The hide of simus may be slightly lighter. Perhaps the most accurate definition is given by Roosevelt and Heller who say that the true colour of simus is smoke-grey while that of bicornis is dark clove-brown.
Measurement of urinary oestrogens and 20 -dihydroprogesterone during ovarian cycles of black (Diceros bicornis) and white (Ceratotherium simum) rhinoceroses