648 MR. P. L. SCLATER ON THE RHINOCEROSES 
about 1? inch in depth, upon examining which it is clearly seen that the whole horn 
has been cleanly torn away from the matrix. 
“Very soon after the loss of the old horn, we observed indications that a new horn was 
forming. This has increased rapidly in size, and is now already perhaps 13 inch in height 
(see fig. 3). It is thus certain that the Rhinoceros has the power of reproducing its horn 
Head of male Rhinoceros, with new horn growing (January 3rd, 1871). 
after the existing one has been broken off. I am well aware that this fact has already 
been noticed by different explorers and observers; moreover Mr. Blyth has informed 
us (see ‘ Field, Aug. 20, 1870, p. 173) that several years ago an accident similar to what 
has been here recorded occurred to an animal of the same species in the Zoological 
Gardens at Moscow, and that in this case likewise the horn grew again. I have never- 
theless thought that the present occurrence is well worthy of a place among the records 
of the Society. It is notorious that the reproduced horn of an animal is liable to be 
materially different in structure from the normal horn; and it is very possibly due to 
some such accident as above mentioned, that we have been favoured with the creation 
of certain new species of Rhinoceroses that have been based upon horns alone.” ! 
At the scientific meeting of this Society held on Feb. 16th last I read an extract from 
a letter addressed to me by Mr. William Jamrach, stating that he was bringing home 
from Calcutta an example of ‘‘a new Rhinoceros, procured in the Bhootan Terai,” and 
I exhibited a drawing of the animal taken in Calcutta in January 1875 by Khaliludin 
* Rhinoceros crossti, Gray, P. Z.S. 1854, p. 250, probably based upon an anterior horn of R. swmatranus 
(cf. Blyth, P. Z. 8.1852, p. 1), and 2, oswellii, Gray, P.Z.S, 1853, p. 46, which is usually considered the same 
as RR, simus. 
