MASTODON ANGUSTIDENS. 289 
Museum of the Geological Society of London, there is a 
much worn fragment of a large molar of the same species 
of Mastodon from the fluvio-marine crag at Euston, Suf- 
folk. Fractured and fragmentary molars of the Mastodon 
angustidens have been discovered in the same formation at 
Horstead, by the Rey. J. Gunn, and at Bramerton by Mr. 
Samuel Woodward. 
Mr. Lyell has recorded other discoveries of Mastodontal 
remains, in his instructive Memoirs on the tertiary, drift, 
and boulder formations of Norfolk. ‘‘In a crag-pit at 
Thorpe,” he observes,* ‘‘ Mr. Wigham has obtained a 
Mastodon’s tooth at the bottom of the deposit, near the 
chalk, associated with pectens and other marine shells.” 
‘“‘ He also discovered, in 1838, at Postwick, together with 
the remains of fish and marine shells, part of the left side of 
the upper jaw of a Mastodon, containing the second true 
molar, and in the socket the indication of another, namely, 
the first molar. This fragment was sufficiently perfect to 
enable Mr. Owen, to whom I submitted it, to refer it to 
Mastodon longirostris, a species also found at Eppelsheim.” + 
At the period when Mr. Lyell submitted this specimen 
to my inspection, although I was by no means convinced 
of the distinction of the Mastodon longirostris of Kaup 
from the Mastodon angustidens of Cuvier, I had not entered 
so fully into the details of the evidence bearing upon this 
question as to justify me in rejecting the name assigned 
by the laborious investigator of the Eppelsheim fossils to 
the species of Mastodon, of which certain specimens, figured 
by Dr. Kaup, bore the closest resemblance to Mr. Wig- 
ham’s interesting fossil; nor was I then possessed of the 
rich series of analogical facts in the dentition of the 
* Proceedings of the Geological Society, April, 1839, vol. ii. p, 128, 
+ Mag. of Nat. Hist. 1839, p. 337. 
U 
