25 



CONKAD, TIMOTHY A. (Continued.) 



Description of a new species of Melania. (Read February 13th.) 



Vol. vii, No. 7, p. 269. February, 1855. 



Description of two new Genera of Shells. (Read June 2d.) 



N. S. p. 165. June, 1857. 



Description of a new Genus of the Family Dreissenidae. (Read 

 June 16th.) 



N. S. p. 167. June, 1857- 



Notes on Shells. (Read June 5th.) 



N. S. p. 231. Juno. 1860. 

 IN JOURNAL OF THE ACADEMY OF NATURAL SCIENCES, PHILADELPHIA. 



On the Geology and Organic Remains of a part of the Penin- 

 sula of Maryland, (giving a list of Recent Shells.) (Read May 

 20th and June 15th, 1830.) 



Scries 1, Vol. vi, Part 2, p. 205. August 1830. 



Descriptions of fifteen new species of Recent, and three of Fos- 

 sil Shells, chiefly from the Coast of the United States. (Read 

 October 5th, 1830.) 



Series 1, Vol. vi, Part 2, p. 256. April, 1831. 



Description of a new Genus of Freshwater Shells. (Read Aug.) 



Series 1, Vol. vii, Part 1, p. 178. 1834. 

 Also in pamphlet. 



Description of a new species of Hinnita. (Read September.) 



Series 1, Vol. vii, Part 1, p. 182. 1834. 



Description of new Marine Shells from Upper California. (Read 

 January and February.) 



Series 1, Vol. vii. Part 2, p. 227. 1837. 



Description of three new species of Unio from the Rivers of 

 the United States. (Read May llth, 1841.) 



Series 1, Vol. viii, Part 2, p. 178. 1842. 



Also published in the Proceedings, Vol. 1, p. 19. 



Descriptions of new Fossil and Recent Shells of the United 

 States. 



Scries 2, Vol. i, Part 3, p. 207. August, 1849. 



Notes on Shells ; with Descriptions of new Genera and Species. 



Scries 2, Vol. i, Part 3, p. 240. August, 1849. 



