MASTODON ANGUSTIDENS. 279 
been abraded by mastication, but more gradually than 
those of the Peruvian Mastodon’s molar figured by Cuvier. 
The fangs and a portion of the anterior part of the crown 
have been broken away in the specimen. 
In Mr. Smith’s figure, the mirror has not been used 
by the engraver, and it consequently, like the woodcut 
fig. 97, represents the molar as having belonged to the 
left side of the jaw, but the specimen is from the right 
side. 
A fine example of the last molar tooth of the left side 
of the upper jaw, obtained by Captain Alexander from 
the sea-shore at Sizewell Gap, Suffolk, so closely corre- 
sponds in size and configuration with the molar in fig. 97, 
that, but for the greater extent of abrasion, it might pass 
for the opposite grinder of the same individual A/astodon. 
A cast of this tooth was presented by Captain Alexander 
to the Geological Society of London, and the following 
notice of it is recorded in the third volume of the ‘ Pro- 
ceedings’ of the Society : 
“The larger cast was taken from a Mastodon’s tooth, 
found on the shore at Sizewell Gap, about seven miles 
from Southwold. When the original came into Captain 
Alexander’s possession, crag adhered to it in considerable 
quantity, and he has no doubt that it had been washed 
from Easton, about a mile and a half north of Southwold. 
The weight of the tooth is two pounds, five ounces and 
a half; its length is about six inches, and its breadth three 
inches and a half; and, although it had been washed eight 
miles, only three of the crowns had been injured.” 
From an inspection of the cast, it appears that the 
first and fifth pairs of tubercles, and the posterior tuber- 
culate talon, have suffered fracture. The effects of abrasion 
from the acts of mastication have extended to the fourth 
