THE WILD CATTLE OF SCOTLAND. 185 
If from the living sharks we pass to the fossils, we have still 
other modes of teething. We find in some of them instead of 
distinct teeth plates covering the jaw, only three plates on each 
half of each jaw. These plates are conical; that is, pointed 
along the margin and broader inward. The teeth increase by 
. curving the point over the jaw while the inner margin is gradually 
enlarging. The triangular pointing of the teeth accounts for the 
increased dimensions of the teeth from the young to the adult. 
_. We have one further step where the teeth, instead of being 
only laid down on the surface of. the jaw, are actually incorporated 
with it, so soldered with it that between the j ow and teeth there is 
hardly me difference recognizable. 
THE WILD CATTLE OF SCOTLAND, OR WHITE 
FOREST BREED. 
BY E. LEWIS STURTEVANT. 
Accorpine to our best authorities two forms of the ox tribe, — 
the genus Bos, existed in Scotland at an early period, Bos primi- 
genius and B. longifrons of Owen. The former was of large size, 
and according to all accounts the color was black; it had white 
: horns with long black points, the hide was covered with hair 
shorter and smoother than in the tame ox, but on the forehead 
long and curly. From the skeletons preserved in our museums | 
the length of this gigantic ox must have been from eleven and 
one-half to twelve feet, and the height at the shoulders about six 
or six and one-half feet.* Darwin remarks that the Pembroke. 
race in England closely resembles this ox in essential structure, 
and that the cattle at present existing in the Chillingham Park 
are degenerate descendants of this breed.t Bos longifrons, on 
the contrary, is described as a distinct species, of small size, short 
body and fine legs. It was eme ee in England during the 
Roman period.t Professor Owen thinks ‘it probable that the — 
Welsh and Highland cattle were descended from this species. § 
* Nilsson, Ann als and Mag. of Nat. oer ee 258. 
estication, i 
