FOUR-HORNED SHEEP 285 
South Oxfordshire Hounds, in which there are two complete 
canines on each side of the upper jaw, one behind the other, 
giving a most remarkable appearance to the head. As 
already said, the complete duplication of the upper canine 
may quite possibly be an extreme development of the 
imperfect fission noticeable in the other specimens ; but, on 
the other hand, it may be due to the growth of a supple- 
mental germ which exists at the root of most mammalian 
teeth, but, as a rule, remains dormant throughout life. 
To return to our sheep. It has now to be mentioned 
that the development of two or more additional horns in 
these animals is by no means the only abnormality which not 
infrequently makes its appearance in connection with these 
appendages. There is, on the contrary, an equally marked 
tendency to “sport” in the opposite direction—-that is to say, 
to the coalescence of the normal pair so as to give rise to 
what are practically unicorn-sheep. 
These unicorn-sheep have a much more restricted habitat 
than their many-horned cousins, being apparently confined 
to a certain portion of the Himalaya or Tibet, although they 
are not referred to by Brian Hodgson in his paper on the 
tame sheep and goats of the Sub-Himalayas and Tibet, 
already referred to. 
Three specimens of the horns of this remarkable breed 
of sheep are known to be preserved in England, two of 
them being in the British Museum (to which they were 
presented by Hodgson), while the third is in the Museum 
of the Royal College of Surgeons, as the gift of Colonel 
Finch in 1830. The latter is described in the Museum 
Catalogue in the following words: “ The horns have grown 
parallel to-each other, and are firmly united throughout 
their whole extent, producing the appearance of a single 
horn, the extremity of which has been sawed off, probably 
