78 Proceedings of the Royal Physical Society. 
the crown is convex, the outer concave and sinuous, the ex- 
tremities projecting into considerable points. A crescentic 
enamel island lies in the centre of the tooth, the concavity of 
which is turned towards the sinuous outer surface of the crown, 
the extremities of the crescent project to the pointed extre- 
mities of the outer surface. At the first glance, it might ap- 
pear as if this tooth were too small for the cranium of so large 
an animal as the great extinct Bos ; but it was found, on trial, 
exactly to fill the empty socket of the corresponding tooth in 
the large cranium of this species in the University Museum, 
already described. On referring to the cranium which be- 
longed to Dr Fleming, I found the corresponding pre-molar 
tooth still in its socket, and presenting exactly the same ana- 
tomical characters. 
The bones which I have obtained from the neighbourhood 
of the town of Preston were found in the year 1836, by the 
workmen employed in digging the foundations for the piers 
of the railway bridge over the River Ribble. They were pre- 
served by Mr Joseph Thornber, and by him presented to S. B. 
Worthington, Esq., the engineer to the Lancaster and Carlisle 
Railway, who deposited them in the Museum of the Lancaster 
Mechanics' Institution. 
Mr Thornber, in a note which he has furnished me with, 
states that the bones were found in a stratum of gravel and 
sand beneath the peat. This stratum rested on a bed of new 
red sandstone. One of these bones is an undoubted relic of 
the Bos primigenius. It was found 26 feet 10 inches below 
the surface. It consists of the left frontal bone, with the 
horn-core still attached to it, and springing from the left 
extremity of the great posterior ridge. The bone has evi- 
dently belonged to a young animal, for it has separated from 
the adjoining bones along the lines of the difierent sutures, so 
that it could not have been permanently connected to them by 
ossification. Its dimensions, also, are much less than those 
of the corresponding bone in the adult crania, already de- 
scribed, its length being only nine inches, and the circum- 
ference of the root of the horn-core nine inches. The core is 
much less tuberculated, and not so strongly grooved as in the 
adult specimen. The other bones consist of a portion of the 
