60 
ORIGINAL ARTICLES. 
p. 56) near Tlascala . In reference to the stratigraphical nature of 
■the deposits, he adds : “ Je crois que tons les terrains du plateau, 
“ composes d’argiles et de cinerites contiennent les memes especes. 
“ Ce sont des amas de dejections volcaniques melees par les eaux qui 
“ ont rempli les basfonds. Ils ont une puissance de plus de 100 
“ pieds.” The remains which have been observed in Texas were 
discovered on the banks of the Brazos and Colorado Elvers, at San 
Eelipe, Bastrop, &c. in the prairie-deposits.* * * § Cases of the occur¬ 
rence of Elephant-remains in the valley of the Mississippi, in the 
States of Louisiana, Arkansas, and Mississippi have been recorded, 
but not in sufficient detail to determine the species. Dr. Warren 
mentions, that he possessed thirty molars of the fossil Elephant of 
Alabama, but he gives no details regarding the conditions under 
which they were found.t All the circumstances connected with the 
remains occurring in Georgia have been carefully investigated by 
able observers. Between the Apalachian Mountains and the At¬ 
lantic there is a wide stretch of horizontal tertiary strata, forming 
three terraces, each about twenty miles wide.J The lowermost, or 
littoral platform, rises from ten to forty feet above the level of the 
sea, and stretches at least 400 miles northward to Newbern on the 
ISTeuse in Carolina. The deposit is fluvio-marine, resting upon 
Eocene strata: although mainly marine, it contains beds of fresh¬ 
water origin, in which the Mammalian remains occur. Lyell con¬ 
siders it to be very analogous to the great Pampean formation of 
South A^merica, as described by Darwin, and to be of Pleistocene 
age. The bones were found between four and six feet below the 
surface, imbedded in clay, resting on yellow sand, and belonged to 
Megatherium, Mastodon , Elephant , &c. The ascertained range of 
E. Columbi, from Mexico to Georgia, includes 18° of Long, and 12° 
of Lat. between the parallels of 20° and 32°. But there are grounds 
for suspecting that it ranged into South America. M. Lartet has 
recorded the fragment of an Elephant’s molar, characterised by thick 
ridge-plates, brought from Cayenne in Erench Guiana by Captain 
Perret, and presented by him to the museum of Marseilles.§ What 
makes this not improbable, is the fact, that Dr. le Conte while in 
Honduras, examined the Mastodon-bed near the village of Tambla, 
in one of the passes, leading from the plain of Comayagua to the 
Pacific, and satisfied himself that the species found there was iden¬ 
tical with M. giganteus, ( Ohioticus ) of North America.|| It is 
therefore not unlikely, that the fossil Elephant of Georgia, may have 
ranged still further south than Mexico, into Guiana. 
* Bollaert. Journ. R. Geograph. Soc. Vol. xx. 1850, p. 115-117. 
t On Mastodon giganteus, p. 62. 
| Hamilton Couper. Geol. Proceeds. 1843, Yol. 4, p. 33; and Ly ell’s Se¬ 
cond Visit to North America, 3 edit. 1855. Yol. 1, p. 347. 
§ Bullet. Soc. Geol. de France, 2d Ser. tom. xvi. p. 500. 
[| Proceed. Acad. Nat. Scien. of Philad. 1858, p. 7. 
