104 
and lower two-thirds of right femur; lower three-fourths of 
right tibia; part of rib ; (5) caudal vertebrae. Deposited by 
Dr. Blackmore. 
This small rodent was rather larger than our common Field vole 
(. Arvicola agrestis ), for the remains of which it might at first sight 
have been easily mistaken. A careful examination of the skeleton 
of the two, however, shows that both upper and lower molar teeth 
in the fossil are larger ; there is a less marked diminution of size 
between the last and first molar tooth, whilst the triangular prisms of 
which they are composed are relatively wider apart than in the Field 
vole. The second upper molar also consists of only “four” triangular 
prisms, the last or internal one being absent. The lower articular 
surface of the humerus is relatively broader, the internal condyle 
more prominent, and the deltoid crest extends lower down in the 
fossil than in the vole. 
The Fisherton fossil is closely allied to, if not identical with, the 
“ Owinyak,” or Greenland lemming (JLemmus Grcenlandicus ), a 
native of Hudson Bay. There is a good recent skeleton in the 
British Museum with which the present fossil has been compared. 
7. Hare ( Lepus timidus ), upper half of left femur. Deposited by 
Dr. Blackmore. 
This bone, and those of the two preceding fossils, are in the same 
semi-fossilized condition as those of the larger extinct mammalia ; 
it was, moreover, dug up about 12 feet from the surface. Professor 
Owen has demonstrated that a hare, probably identical with the 
existing Irish species, was contemporary with the mammoth, rhino¬ 
ceros, &c. 
8. Mammoth ( Elephas primigenius\ small fragment of tusk. De¬ 
posited by Dr. Blackmore. 
9. Fragment of tusk. Presented by Dr. Fowler. 
10. Fragment of small tusk (not from Fisherton). Presented by 
Miss Salisbury. 
These specimens are very insignificent fragments as compared 
with many found in the British Isles. No. 8, however, beautifully 
illustrates the progressive growth of the cement-forming capsule, 
which is hardened by the deposition of earthy salts, and thus con¬ 
verted into dentine: the partial decomposition which this fossil has 
sustained from the loss of nearly all its gelatine has caused the tusk 
to split up into a number of hollow cones. Many examples of 
tusks have been discovered so little altered by time as to be of 
considerable commercial value, finding a ready sale as a substitute 
for recent ivory. The tusks of the mammoth were very much 
more curved than in any living elephant. The perfect specimens 
which have been found arrange themselves in two groups, the 
larger tusks, which probably belonged to the male, measure 9| feet 
in length and about two feet in circumference, the smaller ones 
only between five and six feet in length. A tusk was found at 
