NORTH AMERICAN CONCHOLOGY. 371 



[Proceedings of the Boston Society of Natural History — continued."] 



Conrad, Phillips, &C. — In Proceedings of the Academy 

 of Natural Sciences of Philadelphia, occur the following: — 



Name. 



Locality. 



Conrad. — Descriptions of three new species of Unio : by 

 T. A. Conbad. 



Unio perplicatus Conrad. 

 nodiferus Conrad. 

 parallelus Conrad. 



Jackson, La. 

 Jackson, La. 

 Jackson, La. 



Phillips. — Descriptions of two new species of the genus 

 Helix: by J. S. Phillips. 



Helix bidentifera Phillips. I North Carolina, 



lasmodon Pfiillijis. JAlabama. 



