ADYERTISEMENT. 



The following Lists of the described species of Invertebrate 

 Fossils of North America have been prepared at the request of 

 the Institution for the purpose of facilitating the labelling of the 

 collections and the distribution of duplicate specimens. 



It will be understood that the Smithsonian Institution does 

 not vouch for the accuracy of the Lists, or for their completeness, 

 and that the responsibility in reference to these points rests with 

 the authors. 



JOSEPH HENRY, 



Beci^elary S. I. 



Smithsonian Institution, 



WAsmxGTON, April, 1866 



i 



(ii) 



PHILADELPHIA: 

 COLLINS, PRINTEE. 



