OF THE UNITED STATES. 25 



junction of the Kiameska ; and Dr. Pitcher, of the United 

 States' army, now at Fort Gibson, has politely obtained 

 specimens for my use, among which I readily identify 

 the Gryphsea vomer, Exogyra costata &c. 



MISSOURI. 



Messrs. Lewis and Clarke, Mr. Nuttall and Col. Long, 

 found Baculites, Gryphsea and other marl fossils at the 

 Great Bend of the Missouri river, (lat. 43° 40' N., long. 

 72° W. from Washington,) intimating the existence of 

 the Ferruginous sand in that remote region of our conti- 

 nent, as mentioned on a former occasion. In fact, a great 

 part of the level country between the Rocky mountains 

 and the Mississippi is occupied by this formation ; and I 

 have also seen some fossils from thence, which bear a 

 strong affinity to those of the Lias of Europe. 



I) 



