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of the Mastodon angustidens {Mast, longirostris, Kaup), with the ante- 

 penultimate molar of the right side, and the penultimate molar of both 

 sides of the jaw. All the mastoid tubercles of the crown are worn away 

 to the common base of the dentine in the antepenultimate molar ; and 

 the summits of most of the tubercles in the penultimate molars have 

 suffered abrasion. The crown of both these teeth supports four pairs of 

 tubercles, and an anterior and posterior tuberculate talon. 



From the miocene tertiary formations at Epplesheim in Rhine Hessia. 



Presented by Dr. Kaup. 

 695. A plaster cast of a considerable proportion of the superior maxillary bone 

 of the Mastodon angustidens {Mast, longirostris, Kaup). It exhibits the 

 whole of the palate, and the molar series as it is reduced by age. This 

 series consists in the present example of two teeth on each side, viz. the 

 penultimate molar and last molar. The penultimate, which is the fourth 

 of the permanent series, supports four pairs of mastoid tubercles all of 

 which have had their enamelled summits removed by mastication, and the 

 two anterior pairs are worn down to their common dentinal base. The 

 last molar has five pairs of tubercles, and a large posterior talon which is 

 subdivided into three or four small tubercles. The summits of the 

 anterior tubercles only have been worn by mastication. This tooth is 

 supported by two principal roots, the anterior of which is the smallest, 

 and supports the two anterior pairs of cusps ; the posterior root, which 

 sustains the rest of the crown, becomes subdivided in the progress of 

 age. 



From the miocene tertiary formations at Epplesheim in Rhine Hessia. 



Presented by Dr. Kaup. 

 696. A plaster cast of the crown of an incompletely formed molar of the 

 Mastodon angustidens, Cuvier {Mast, longirostris, Kaup). It presents 

 four transverse eminences, each divided into two principal and nearly equal 

 mammillae ; the fourth or smaller eminence has a posterior talon, and 

 there is a smaller obtuse eminence in each of the three intervals of the 

 large ridges. 



From the miocene tertiary formations at Epplesheim in Rhine Hessia. 



Presented by Dr. Kaup. 



