1902-3.] Sir William Turner on the Sperm Whale. 
427 
varied in length from 80 to 69 mm. The remaining four were 
pointed at the crown, but were broadened and flattened at the 
fang ; the longest of these teeth was 88 mm., the shortest was 64 
mm., and the broadest part of the fang ranged from 22 to 32 mm. 
in different teeth. In five of these teeth a shallow pulp cavity 
was present, but in the others it was obliterated by hard dense 
tooth substances, wdiich was frequently irregularly tuberculated. 
The crowns in four teeth were pointed at the tip, but in the 
others the tip was roughened and somewhat jagged. In no speci- 
men was the crowm polished or worn, and the presumption is that 
they had not cut the gum. The bent teeth were most interesting 
in their form. The largest specimens were curved to about \ of 
a circle, the two smaller to about ^ a circle, but owing to a twist 
in the tooth the tips of the crown and fang were not in the same 
plane. Several had odontomatous excrescences on the concave 
aspect of the tooth, resembling the maxillary tooth figured by Sir 
W. H. Flower. These teeth were obviously rudimentary and 
functionless. 
The sockets of the teeth were elongated antero-posteriorly. 
Those which had the largest teeth were 8 inches in length and 
about 3 \ inches in greatest breadth. In each alveolus the hinder 
end was the deepest part, from which it gradually shallowed 
forward. The fang of the tooth was lodged in the deep posterior 
end. The teeth in the two halves of the mandible behind the 
8th pair were not set directly opposite to each other, and for 
some distance backwards a tooth on one side was opposite the 
interval between two teeth on the other side, so that the teeth 
were not symmetrically arranged ; the dental formula, judging 
from the alveoli, was 23 in the right and 22 in the left half of the 
mandible. 
In two previous communications which I have made to this 
Society on the occurrence of the sperm whale in the Scottish seas, 
I referred to all the cases of which I had been able to find a 
reference. 1 As the specimen now described gives an additional 
example, I append the following table, so as to make the record 
complete. 
1 Proc. Roy. Soc. Edin . , Feb. 6, 1871, and Jan. 29, 1872. vol. vii. 
