284 PROBOSCIDIA. 
How far the testimony of the workmen may be relied 
upon as indicative of arrested decomposition and change 
to adipocere of the soft parts of an entire Mastodon, may 
be questioned ; but the tooth is, without doubt, such as 
Mr. Layton has described, showing eight alternating un- 
worn mastoid eminences ; but belonging, not to the MJasto- 
don giganteus, as might be inferred from the term Great 
Mastodon, but to the Mastodon angustidens. 
The molar tooth, the grinding sur- 
face of which is represented at fig. 
100, is the fourth in the order of 
size, and the third in the order of 
Fig. 100. 
position, counting backwards in the 
upper jaw, before any of the teeth 
: Molar, Mast ; 
upd men te, care sphedis sand vik belonged to the 
don angustidens, Fluyio- 
marine Crag, Norwich, left side of the mouth. This beau- 
a tiful specimen also forms part of the 
collection of Mr. Fitch, and was obtained by that zealous 
collector of the organic fossils of Norfolk from a crag-pit 
at Postwick, in the vicinity of Norwich: it was imbedded 
in the fluvio-marine crag, with the characteristic shells 
of that formation, immediately above the chalk. 
This tooth corresponds with the larger molar in the 
portion of the upper jaw of the Mastodon angustidens, 
from the tertiary deposits at Dax, figured by Cuvier in 
his ‘ Divers Mastodontes,’ pl. ii., fig. 2; and with the 
largest molar in a similar portion of the upper jaw of 
the same species of Mastodon from Eppelsheim, figured 
by Dr. Kaup in tab. xvi., figs. 1 and 1 a@ of his work 
on the Mammalian Fossils of that locality. In Dr. Kaup’s 
figure, the tooth in question is associated with the first 
and second molars of the Mastodon angustidens, which are 
much worn, and are true deciduous teeth, the only ones, 
