Oeology and Natural History. 



,' that the floccuk'iit opn 



regjird to tlie Tertiary 5[amnialiau fife of thi- ('ontimnt. 



On the Sweet Water river, eii?liteen mih- we^t ..f DrviT? (ii.te, 

 ^^iler than'^S: *^'' bones arJ m:^tly ^^^-^^^^^ t^^j:;r^u^7'^ 



^!'^v'o;);)i^^'«£^.il i^r^leieHhellfrnm tl^i^'^^^vL ''"^^ 

 From Fort Bridger there is a molar <.f appaiviitly :i siimll -iieclos 



l^accooii, named Xotharctus tenebrosu<. 



8. Fossil Mammals from Oregon ; J. Leipy, (ib.).-The speci- 

 mens were from Rev. thos. Condon of Dalles City, Oregon. Dr. 



