LIST OF CONTRIBUTORS. 87 



Lea, Isaac. Continued. 



Descriptions of three new species of exotic Unionidae. P 



'60. 307 



Descriptions of six new species of Unionidae from Alabama. 



P '60, 307 



— On Helix cumberlandiana. P '60. 363 



— On the number of species of Unionidae in the United States. 

 P '60, 3, 85 



— • Descriptions of twenty-five new species of Unionidae from 

 Georgia, Alabama, Mississippi, Tennessee and Florida. P '61. 38 



— Descriptions of new species of Schizostoma, Anculosa and 



Lithasia. P '61, 54 



— Description of a new species of Neritina, from Coosa River, 

 Alabama. P '61, 55 

 - — ■ Descriptions of twelve new species of Uniones from Alabama. 



P '61, 59 



— Description of a new genus (Strephobasis) of the family 

 Melanidae and three new species. P '61, 96 



— Descriptions of forty-nine new species of the genus Melania. 



P '61, 117 



— Descriptions of new fossil Mollusca, from the Cretaceous 



formation at Haddonfield, N. J. P '61, 148 



— Descriptions of eleven new species of the genus Unio from the 

 United States. P .'61, 391 



— Descriptions of seven new species of the genus Io. P '61. 393 



— Descriptions of two new species of Unionidae of the United 



States. P '62, 168 



Descriptions of two new species of Unionidae of the United 



Melanidae, and of forty-five new species. P '62, 169 

 — ■ Descriptions of two new species of exotic Uniones and one 



Monocondylcea. P '62, 176 

 — Description of a new genus (Goniobasis) of the family Me- 



lanidae and eighty-two new species. P '62, 262 



— Descriptions of eleven new species of Melanidae of the United 

 States. P '62, 272 



— Descriptions of fourteen new species of Melanidae and 



Paludina. P '63, 154 



— Description of eleven new species of exotic Unionidae. P 

 '63, 189 



— Description of a new species of Unio and a Monocondvloea. 

 P '63, 190 



