CONTENTS. Vll 



Page. 



5, 6- Correction— Footsteps and Impressions of the Chirothe- 



riura, and of various Animals, in sandstone, - - 394 

 7. New Works received, 399 



Specimens in Geology are wanted for a public institution. 

 Those of organic remains and of the junctions of rocks are most 

 desired. They must be excellent in their kind, of considerable 

 size, say from 4 to 8 inches square, fresh, and not rubbed, soiled 

 or bruised, extremely well characterized and labelled with care, 

 particularly as to locality and geological association. None must 

 be sent without previous notice. For such specimens a reasona- 

 ble, but not an extravagant, price will be paid. Superior speci- 

 mens in mineralogy are included. Letters may be addressed to 

 Prof. Silliman at New Haven. 



