CONTENTS. 



PAG 



Family ACHATINIDJ3 vii 



Anatomy of Achatininae viii-xv 



Key to genera of Achatininae xv 



Subfamily Stenogyrinae xvi 



Key to genera of Stenogyrinae , xviii 



Descriptions of Genera and Species. 



Genus ACH ATIN A Lamarck 1 



Subgenus Leptocala Ancey , 72 



Genus COCHLITOMA Fer., Pilsbry 76 



Genus ARCH ACH ATIN A Albers, Pils 104 



Genus COLUMNA Perry 120 



Genus CALLISTOPLEPA Ancey 125 



Genus HOMORUS Albers 130 



Subgenus Subulona Martens 138 



Genus CEBAS Dupuis et Putzeys ( 155 



Genus PSEUDOGLESSULA Boettger 156 



Genus CHILONOPSIS F. de Waldheim 171 



Genus BOCAGEIA Girard 216 



Subgenus Petriola Dall 216 



Genus CLAVATOR Martens , 192 



Genus RIEBECKIA Martens 204 



Genus RUMINA Risso 211 



APPENDIX 216 



Genus LIMICOLARIA 216 



Index to genera and subgenera 219 



Reference to plates 221 



Dates of issue of the parts of vol. xvii 232 



(v) 



