164 LIST OP CONTRIBUTORS. 



Say, Thomas. Continued. 



Description of new species of land and freshwater shells of 



the United States. J i, 123 



Account of two new genera and several new species of fresh- 

 water and land shells. J i, 276 



Notes on Professor Green's paper on the Amphibia, published 



in the September number of this Journal. J i, 405 



Observations on some of the animals described in the account 



of the Crustacea of the U. S. J i, 442 

 — Description of a new genus of fresh-water bivalve shells. 



J i, 459 



— Descriptions of the Thysanourae of the United States. J ii, 11 



— An account, of the Arachnides of the United States. J ii, 59 



— Descriptions of the Myriapodae of the United States. J ii, 102 



— Descriptions of univalve shells of the United States. J ii, 149 



— An account of some of the marine shells of the United States. 

 J ii, 221, 257, 302 



— On a quadruped, belonging to the order Rodentia. J ii, 330 



— On a South American species of Oestrus which inhabits the 



human body. J ii, 353 



— Description of univalve terrestrial and fluviatile shells of the 

 United States. J ii, 370 



— Descriptions of dipterous insects of the United States. J iii r 



9, 73 



— Descriptions of coleopterous insects collected in the late Ex- 

 pedition to the Rocky Mountains, performed by order of Mr. 

 Calhoun, Secretary of War, under the command of Major Long. 

 J iii, 139, 238, 298, 403 ; iv, 83 



— An account of some of the fossil shells of Maryland. J iv, 124 



— On the fresh water and land tortoises of the United States. 



J iv, 203 



— Descriptions of three new species of Coluber, inhabiting the 

 United States. 3 iv, 237 



— On two genera and several species of Crinoidea. J iv, 289 



— Descriptions of new hemipterous insects collected in the Ex- 



pedition to the Rocky Mountains, performed by order of Mr. 

 Calhoun, Secretary of War, under command of Major Long. 

 ,j iv, 307 



— On a new species of Modiola. J iv. 368 



— ■ Descriptions of new species of Sister and Hololepta, in- 

 habiting the United States. J v, 32 



