118 TRANS. OF THE ACAD. OF SCIENCE, 
Professor Holmes had further expressed the opinion, that 
“it has been scknowletged that the mastodon, megatherium, 
and tw nera, are 
the di: of e 
that existed at a period so recent, that, in the 
Leidy, “it is gene witne: their declining existence.”— 
(Post-Pliocene Foss., 1858. y- It was not the purpose of Mr. H. to allude to 
the , that existed, of the contemporaneousness of Man and the Mas- 
todon on continent, but merely to observe, wpe the researches of emi- 
, thus far, to have furn i 
objection by — of antecedent t improbability against it the hypothesis. 
Mr. Spsrtes presented a fossilized nut, from i 
District, O hio; also, a mass of iron ore, from the Tron’ foun- 
tain, Mo., about ten feet sas the surface, in ferruginous 
clay, at the foot of the moun 
gs Ae Woods, and John Lapsley, Esq., were cet 
