CONTENTS 



OF 



PART THE FIRST. 



By John J. Audubon. p age 



Note on the Hirundo fulva, . - - - - - 163 



Facts and Observations on the permanent residence of the 



Swallow in the United States, - - - - - 166 



By Daniel H. Barnes. 

 Notice of several species of Shells, ..... i3x 



By De Witt Clinton. 

 Description of a new species of Fish from the Hudson River, - 49 

 On the Hirundo fulva of Vieillot, with some general remarks 



on the birds of this genus, - - - - - -156 



By William Cooper. 

 On the remains of the Megatherium recently discovered in 



Georgia, - - - - - - - - -114 



Account of the discovery of a skeleton of the Mastodon 



giganteum, 143 



By IsSACHAR COZZENS. 



Examination of the acid of the Rhus glabrum ; with observa- 

 tions on the juice of the Sambucus Canadensis as a deli- 

 cate test, ..-.----.42 

 By Frederick S. Cozzens. 

 Observations on the manners of the Hystrix dorsata, or Por- 

 cupine of North America, . - - - ■■. - 190 

 By James E. Dekay. 



Note on the organic remains termed Bilobites, from the 



Kaatskill Mountains, .-.--..45 



An account of the Phoca cristata recently taken in the vici- 

 nity of this city, ------..94 



Observations on the structure of Trilobites, and description 



of an apparently new genus, - - - - - 174 



By Joseph Del afield. 



Notice of new localities of simple Minerals along the north 



coast of Lake Superior, &c. ------ 79 



By Abraham Halsey. 

 Synoptical view of the Lichens growing in the vicinity of the 



city of New- York, --...__ 3 



Remarks on certain Entozoical Fungi, ----- 125 



By Edwin James. 

 On the identity of the supposed Pumice of the Missouri, with 

 a variety of Amygdaloid found near the Rocky Moun- 

 tains, .-21 



