CONTENTS 



OF 



VOLUME I.— PART I. 



Introduction ^^^ 



Description of six new species of the genus Firola, observed 



by Messrs. Le Sueur and Peron in the Mediterranean Sea, 



in the months of March and April, 1809. By C. A. 



3 

 Le Sueur. 



Account of a North American Quadruped, supposed to be- 

 long to the genus Ovis. By G. Ord 8 



Descriptions of seven species of American Fresh-water and 



Land Shells, not noticed in the systems. By Thomas Say. 13 



1 7 

 The same, concluded 



Descriptions of several new species of North American In- 

 sects. By Thomas Say. ^^ 



Observations on the genus Eriogonum, and the Natural Order 



PoLYGONEiE of Jussleu. By Thomas Nuttall. . . 24 



Notice of thelate Dr. Waterhouse 31 



Observations on the genus Eriogonum, &c. concluded. 33 



Characters of a new Genus, and descriptions of three new Spe- 



cies upon which it is formed; discovered in the Atlantic 



ocean, in the months of March and April, 1816; lat. 22° 9^ 



By C. A. Le Sueur ^'^ 



Description of three new species of the genus Raja. By C. A. 



Le Sueur "** 



Some Account of the Insect known by the name of Hessian Fly, 



and of a parasitic Insect that feeds on it. By Thomas Say. 45 

 On a new genus of the Crustacea, and the species in which 



it is established. By Thomas Say 49 



An Account of an American species of the genus Tantalus 



or Ibis. By George Ord 53 



An Account of the Crustacea of the United States. By 



Thomas Say. ^^ 



An Account of the Crustacea of the United States, continued. 65 



