78 PROCEEDINGS OF [April, 



the Genus Tetracauladon, &ic., &c., by Dr. Isaac Hays. — From 

 Dr. Isaac Hays, of Philadelphia. 



Description of a fragment of the Head of a new Fossil Animal, dis- 

 covered in a Marl pit, near Morristown, New-Jersey, by Dr. Isaac 

 Hays. — From Dr. Isaac Haijs, of Philadelphia. 



Description of a new Genus, and new species of extinct mammiferous 

 Quadrupeds, by Dr. John G. Goodman. — From Dr. Isaac Hays, 

 of Philadelphia. 



Letters were read : — 



From Professor Gerard Troost, of Nashville : Announcing his in- 

 tention to make up a collection " of the Natural Products of Tennes- 

 see," for the Cabinet of the Institution. 



From John V. Ingersoll, of Mineral Point, Wisconsin ; Stating that 

 he and Mr. Stephen Taylor had forwarded for the Cabinet of the 

 Institution, specimens of remains of an ancient city, called Atzalan, 

 and that they would shortly forward a communication on the sub- 

 ject. 



From John Locke, Cincinnati : Recommending Mr. C. Evans' in- 

 vention called the "Steam Safety Guard." 



From B. S. Roberts, Plattsburgh ; Describing measures he had 

 taken to procure for the Cabinet of the Institution the Geology and 

 Mineralogy of Western New- York. 



From ]\I. F. Maury, U. S. Navy: Enclosing a letter from Captain 

 Hunter, of the Revenue service, offering to aid in making collections 

 for the Cabinet of the Institution. 



From Wm. R. Staples, Providence, Rhode-Island: Informing the 

 Institution that the Collections of the Rhode-Island Historical So- 

 ciety would be regularly transmitted to it. 



From Charles Baldwin: Suggesting the advantage of adding a De- 

 partment of Statistics to the [nsiitution. 



From David Dale Owen : Stating that he had shipped the collec- 

 tion of Minerals and Geological specimens lately made by him, while 

 employed by the United States General Land Office, and that he 

 had added a series of the Maclure Minerals, presented by Alexander 

 Maclure, of New-Harmony, Indiana. 



