>\ 



I Y 



CONTENTS. 



Family BULIMULID^K (continued). 

 Genus Bulimulus Leach (continued), 



Subgenus Plectostylus Beck, . 



Subgenus Scutalus Albers, . 



Subgenus Buliraulus, s. str., . 



Subgenus Rhiuus Albers, . 



Subgenus Hyperaulax Pilsbry, 



* 



* 



Subgenus Protoglyptus Pilsbry, . 

 Subgenus Nsesiotus Albers, ... 

 Subgenus Orthotomium Crosse <fc Fischer, 



Section Plicolumna Cooper, . . . . 



Subgenus Sonorina Pilsbry, . . . . . 



Genus Neopetrceus von Martens, . . 



Genus Oxychona Morch, . . . . . 



Genus Drymceus Albers, .... 



Subgenus Zaplagius Pilsbry, ..... 



Subgenus Drymreus s. sir., including Mesembrinus . 

 Section Stenostylus Pilsbry, . . . . 



Explanation of plates, ....... 



[NOTE. The North American and Antillean species 

 mceus, and the subgenus Liostracus, will be included in vol 



1 



2, 317 



12, 317 



35, 319 



74 



82 



84 

 94 



. 125 

 .151 

 .155 

 .163 

 .181 

 .182 



185,320 

 . 191 

 .313 

 . 323 



of Dry- 



XII.] 



