76 FOSSIL MAMMALIA. 



Compared with that of the elephant, the jaw of the mastodon 

 with narrow teeth has its anterior beak longer, and more nar- 

 row in the middle. It is not truncated so vertically. The 

 foramina menti are one behind the other, not one above the 

 other. From another lower jaw, entire behind, we find that 

 this part was more rounded in this species than in that of the 

 Ohio, and more resembled that of the elephant. 



A tibia, brought from the Giants-Field, near Santa-fe-de- 

 Bogota, by M. de Humboldt, is the only great bone of the 

 extremities which has been seen. It is much mutilated at the 

 angles, which renders the characters not well determined. A 

 little thicker in proportion than that of the Ohio, it is yet like it 

 in its forms. It is short, by calculation from the proportions 

 of the teeth ; but no definite conclusions can be drawn from 

 a single bone. 



It appears that the remains of this mastodon are often found 

 accompanied by marine productions, which is not the case with 

 the others. 



The turquoises of Simorre are composed of these and other 

 bones, penetrated and impregnated with some metallic oxide. 



The stories of giants in South America seem founded on 

 these remains. The name Giants-Field, above-mentioned, is 

 probably derived from this source, as, according to M. de 

 Humboldt, there is an immense accumulation of these bones 

 there. They are found in that continent, usually, in a very 

 high degree of elevation. 



Some teeth have also been found, which seem to indicate 

 other species of the mastodon, differing from the two preced- 

 ing. M. de Humboldt brought some from South America, 

 the tubercles of which are divided, like those of the mastodon, 

 with narrow teeth, but which have the same canine proportions 

 as those from the Ohio with six points, and might be taken for 

 them, but for the trefoils. They are of two sizes ; the largest 

 are equal in magnitude to those of the Ohio. M. de Hum- 

 boldt found one near the volcano of Imbaburra, in the king- 



