33590. The associated second right upper true molar and the third 

 true molar of both sides; from St. Gaudens. The last 

 tooth has a well-developed cingulum, and carries four 

 ridges and a hind talon. Purchased, 1858. 



33588. The third left upper true molar, in an almost unworn con- 

 dition ; from St. Gaudens. The specimen has only three 

 ridges and a hind talon. Purchased, 1858. 



33592. Two upper incisors ; from St. Gaudens. These specimens 

 show a broad enamel-band. Purchased, 1858. 



40918. Cast of the first left lower true molar. The original is from 

 the Middle Miocene of Soblay (Ain), France, and is pre- 

 served in the Museum of Natural History at Lyons ; it is 

 figured by Lortet and Chantre, op. cit. pi. ix. fig. 6. 



Presented by C. Falconer, Esq., 1867. 



40933. Cast of the germ of the second right lower true molar. The 

 original is from Soblay, and is preserved in the Museum 

 of Natural History at Lyons ; it is figured by Lortet and 

 Chantre, op. cit. pi. ix. fig. 3. A very similar specimen 

 from Croatia is figured by Vacek in the Abh. k.-k. geol. 

 Reichs. vol. vii. pt. 4, pi. vii. fig. 4 (1877). 



Presented by C. Falconer, Esq., 1867. 



33587. The third right lower true molar, probably belonging to the 

 same individual as No. 33588 ; from the Middle Miocene 

 of St. Gaudens. There are three ridges and a talon. 



Purchased, 1858. 



Mastodon angustidens, Cuvier 1 . 



Syn. Mastodon cuvieri, Pomel 2 . 



Mastodon simorrensis, Lartet 3 . 



Mastodon gaujaci, Lartet 4 . 



Mastodon pyrenaicus, Falconer 5 (ex Lartet, MS.). 



Tetrdbelodon angustidens, Cope 8 . 



According to Falconer 7 the so-called M. gaujaci was founded on 

 a small form of the present species; while Gaudry 8 states that 



Ann. d. Museum, vol. viii. p. 412 (1806). Mastodonte a dents itroites. 



Bull. Soc. G6ol. France, ser. 2, vol. v. p. 258 (1848). 



Notice surla Colline de Sansan, p. 24 (1851). 



Ibid. p. 27. 



Quart. Journ. Geol. Soc. vol. xiii., table opposite p. 319 (1857). 



Proc. Amer. Phil. Soc. vol. xxii. p. 5 (1884). 



Palaeontological Memoirs, vol. ii. p. 24 (1868). 



Les Enchainements, &c. Mammiferes Tertiaires, p. 175 (1878). 



