278 PROBOSCIDIA. 



angustidens from Eppelsheim, figured in tab. xviii. of the 

 great work by Dr. Kaup on the Mammalian Fossils of 

 that locality. To place the source and matrix of Mr. 

 Smith's fossil beyond doubt, I applied to Mr. R. Fitch, 

 of Norwich, for the loan of his specimens of the molars 

 of a Mastodon angustidens from the crag-pits near that 

 city, and took the largest specimen to the British Museum 

 for comparison with the tooth in question. The identity 

 of structure and colour between the two fossils was com- 

 plete ; the dentine in both had the same rich brown tint, 

 brittle texture, and superficial ferruginous stain ; both 

 belonged to the same species of Mastodon, and alike mani- 

 fested the well-known characters of crag fossils. 



The crown of the molar from Mr. Smith's collection 

 measures seven inches in length, three inches in breadth 

 across its base, and the height of the highest unworn 

 mammilla is two inches and a half; the crown is di- 

 vided into five pairs of mastoid eminences and a strong 

 tuberculated posterior ridge, or talon ; resembling, in this 

 respect, that of the molars above cited from Cuvier, and the 

 figures 6, 7, and 8* of tab. xviii. of Dr. Kaup ; and showing 

 a greater complexity than do the more simple varieties 

 of the last molar of the Mastodon angustidens, represented 

 in figures 1, 2, and 3 of the same plate. The mastoid 

 eminences have a subalternate disposition, and the smaller 

 connecting eminence, which rises from the middle of each 

 transverse valley, is well developed : the summits of the 

 larger processes are more or less subdivided ; but this cha- 

 racter is best seen in the unworn teeth. The summits 

 of the first, second, and third pairs of mamrnillse have 



* These are all referred by Dr. Kaup to his Mastodon longirostris, who, never- 

 theless, distinguishes that nominal species from the Mastodon angustidens of Cuvier 

 by a more complex last molar tooth. 



