NORTH AMERICAN CONCHOLOGY. 



103 



91 



Vanuxemensis Lea. Mexico. 



Pleifler. — Monographia Heliceorum Yiventium. Sistens De- 

 scriptioiies Systematicas ct Criticas omnium hujus familiae 

 geuerum et specierum hodie coguitarum. Auctore LuDovico 

 Pfeiffer, Dr., Cassellano. Yolumen Priraum. Lipsia?, Plag. 

 1-20, 1847 ; Plag. 21-31, and Plag. i-xxxii, 1848. 



[I omit the Catalogue names of Beck and others, published without de- 

 scriptions. — W. G. B.] 



