364 ON THE FOSSIL BONES OF PACHYDERMATOUS QUADROPEDS, 



gether ; and how much more easy is it to confound the lignites of seve- 

 ral ages. At all events, it must be admitted that this scrutiny is 

 worthy of the examination of geologists. 



Owing to the generous attentions of M. de Humboldt, the museum 

 has lately been enriched by several fragments of the bones of this mas- 

 todon, exhumed near Santa-Fe de Bogota, in Columbia, at a place 

 called Cano del Fiscal. Among the number is a humerus almost com- 

 plete, and a calcaneum quite entire. The humerus is shorter in pro- 

 portion than that of the great mastodon. It is 21 inches, or 0,568 

 long, and seven, or 0,189 broad at its base : thus confirming an idea 

 suggested to me by a tibia of the same canton, viz. that the narrow- 

 toothed mastodon was shorter limbed than those species to which it 

 approximates. 



SECTION III. 



ON SOME TEETH BELONGING TO THE 1LA.ST0D0N SPECIES, WHICH AP- 

 PEAR TO INDICATE SPECIES DIFFERING FROM THOSE ALREAI>7 ENU- 

 MERATED. 



To the kindness of M. Humboldt I am indebted for some teeth from 

 South America, whose tuberosities are divided like those of the nar- 

 roxo-toothed mastodon ; but which have the same square proportions 

 of those of six denticuli of the Ohio, and which might be taken for 

 them, were it not for the ti-efoil figures, which cannot be confounded 

 with the lozenges of the mastodon of Ohio. There are two sizes of 

 them. The largest have the same dimensions as the corresponding 

 teeth of the Ohio. 



M. de Humboldt has brought home one, which he found near the 

 volcano of Imbaburra, in the kingdom of Quito, 1200 toises high. It 

 is very much decomposed, and is still covered with volcanic ashes. Its 

 enamel is of a reddish tint. It is 0,12 long, and 0,085 broad. (See 

 plate 27, fig. 1). 



The same accomplished traveller found another specimen of the 

 same kind at the convent of Chiquitos, near Santa-Cruzade la Sierra, 

 at the ISth degree of southern latitude, almost the centre of South 

 America. This fragment is very much mutilated : one of its thickest 

 roots is more than six inches in length. The osseous substance is of a 

 reddish tint, and the enamel is blackish at its surface. To the same 

 species I attribute a tooth found in this same province of Chiquitos, 

 a drawing of which has been sent me by M. Alonzo, of Barcelona 

 (plate 27, fig. 12). As it is not entire in its fore part, I cannot de- 

 signate its place ; but from its fang I am inclined to think that it is 

 either the middle or posterior upper. 



That district lying on the other side of the Cordillieres, appears to 

 be very productive of those spoils. The late Joseph de Jussieu, writ- 

 ing from Lima in 1761, states that in the valley of Tarija, in the 

 twenty-third degree of southern latitude, at a distance of 150 leagues 

 from the sea, and at 200 leagues from Potosi, they met with bones and , 

 petrified teeth in abundance on both sides of the river ; that he himself 



