ERRATA 



P. 200j 5th line fr. hot. after presiding, read over the Math, and Phys. Section. — 

 P. 207, 4th line fr. top, for 1837, read 1835.— P. 216, 4th line from hot. for Para- 

 eels, read Pratas. — P. 325, last line, for commenced, read enumerated. — P. 374, 6th 

 line from bot. for It it, read It is. — P. 400, 13th line from hot. for Moranies, read 

 Moraines. 



Fossils of the Medial Tertiary of the United States, by Mr. T. A. Conrad. — Mr. 

 Dobson of Philadelphia, in a letter dated Dec. 31, 1838, (received after our present 

 number was printed,) announces that he has published the first part of this new 

 work of Mr. Conrad. It will be completed in about 15 months, in 3 parts. The 

 first No. contains 17 plates, and 47 species. He will again visit the Tertiary re- 

 gion, and give a detailed description of the various localities in a future number. 

 The price of the whole, will be $ 4 50. 



