106 [October, 1841. 



vicinity of Cincinnati, Ohio. Presented by Mr. J. G. An- 

 thony, of Cincinnati, through Mr. J. S. Phillips. 

 The copperplates belonging to Conrad's Marine Shells, num- 

 bers 1 to 8 inclusive, and 11 and 12, being all the coppers 

 used in that work, were presented by T. A. Conrad, through 

 J. S. Phillips : Mr. Conrad reserving to himself the privi- 

 lege of taking such impressions from them as he may here- 

 after require. 



DONATIONS TO LIBRARY. 



Katalog von Petrefacten. Sammlungen, nach Brown's Lethea 

 Geognostica. 8vo. Heidelberg, 1841. From Francis 

 Markoe, Jr., Esq. 



Catalog fur geognostisch-petrefactologische Sammlungen. 



8vo. Heidelberg, 1841. From Francis Markoe, Jr. Esq. 

 Transactions of the Zoological Society of London. 4to. vol. 



2, Part 5. London, 1841. From the Society. 



Reports of the Council and Auditors of the Zoological Society 

 of London. 8vo. London, 1841. From the Society. 



A new Pocket Map, Geological and Topographical of Nova 

 Scotia. From Francis Alger, Esq. 



Written Communications. A letter was then read from 

 Thomas M. Brewer, Esq. of Boston, acknowledging the an- 

 nouncement of his election as a corresponding member. 



Dr. Morton read the following communication on a section 

 of the Geology of the United States. 



Description of several new species of Fossil shells from the 

 cretaceous deposits of the United States. 



First series, from Upper Missouri, 



It is now nearly forty years since Messrs. Lewis and Clark, in 

 their expedition to the Columbia river, procured a few fossils at the 

 great bend of the Missouri river, (Lat. 43 40' N.) which I identi 

 fied as belonging to cretaceous deposits of the same age as the Marl 

 or Ferruginous sand of New Jersey, Delaware, Alabama, &c. Sub- 



