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 Rev. 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," 5 ' " Mr. Wigham has obtained a 

 Mastodon's tooth at the bottom of the deposit, near the 

 chalk, associated with pectens and other marine shells. 1 ' 

 " He also discovered, in 1838, at Post wick, 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."-f- 

 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' 1 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. iii. p. 128. 

 t Mag. of Nat. Hist. 1839, p. 337. 



