61 

 ROGERS, PROF. WILLIAM B., Boston. 



IN SILLIxMAN'S AMERICAN JOURNAL OF SCIENCE AND ARTS. 1st Series. 



Analysis of Shells. 



Vol. sxvi, No. 2. p. 361. July, 1834. 



RUSCHENBURGER, W. S. W., M.D., PMladelpMa. 



NATURAL HISTORY. 2 Vols. 8vo. Philadelpliia, 1850. 



Conchology. Vol. i, Book 5. Also issued separately. 



RUSSELL, JOHN LEWIS. 



IN JOURNAL OF THE ESSEX COUNTY NATURAL HISTORY SOCIETY. 



SALEM, MASS. 



Familiar Notice of the Shells found in the limits of Essex 

 County, Mass., Avith Reference to descriptions and figures. 



Vol. i, No. 2, p. 47. June, 1839. 



SAGER, ABRAHAM, M.D., Ann Arbor, Michigan. 



IN SECOND GEOLOGICAL REPORT OF MICHIGAN, (SENATE DOCUMENT,) 

 DETROIT. January 12th, 1839. 



Catalogue of Animals observed in the State of Michigan.— 

 Shells, p°13. 



SAY, THOMAS, Philadelpliia, (Deceased.) 



IN JOURNAL OF THE ACADEMY OF NATURAL SCIENCES, PHILADELPHIA. 



First Series. , 



Description of seven new Species of American Freshwater and 

 Land Shells, not noticed in the Systems. 



Vol. 1, Part 1, No. 1, p. 13. May, 1817. 

 Vol. i. Part 1, No. 2, p. 17. June, 1817. 



Descriptions of new Species of Land and Freshwater Shells of 

 the United States. (Read October 28th.) 



Vol. i. Part 1, No. 6, p. 123. October, 1817. 



Account of two Genera and several new Species of Freshwater 

 and Land Shells. (Read May 25th.) 



Vol. i, Part 2, p. 276. Juno, 1818. 



Description of a new Genus of Freshwater Bivalve Shells. 



Vol. i. Part 2, p. 459. Dccombor, 1818. 



Descriptions of Univalve Shells of the United States. 



Vol. ii, Part 1, p. 149. Norember, 1821. 



