CONTENTS 



PAGE 



Introduction 



Terminology of the teeth of Pupillidse vii 



The family Pupillidge x 



The subfamily Gastrocoptinge x 



Descriptions of genera and species 

 The Gastrocopta group of genera. 



Genus CH^NAXIS Pilsbry & Ferriss (Arizona) . 1 



Genus GIBBULINA Beck (South America) 5 



Genus GASTROCOPTA Wollaston 6 



North American and West Indian species. . 12 



South American species 89, 357 



Species of Eastern Asia, Japan and Indo- 



China 103 



Species of Western Siberia and the Euro- 

 pean Tertiary 112 



Species of Africa and the Mascarene Is- 

 lands 118, 358 



Species of Ceylon, India and Malay Penin- 

 sula 134 



Species of the Philippines, Polynesia and 



Melanesia 140 



Australian species 155 



Genus BOTHRIOPTJPA Pilsbry (Tropical America) 226 



The Hypselostoma-Boysidia group of genera 172 



Genus HYPSELOSTOMA Benson (Oriental Re- 

 gion) 175, 360 



Genus ANAUCHEN Pilsbry (Oriental Eegion) . . 188 



Genus BOYSIDIA Ancey (Oriental Eegion) 192 



Genus GYLIAUCHEN Pilsbry (Oriental Eegion) . 210 

 The Aulacospira-Systenostoma group of genera .... 220 

 Genus AULACOSPIRA Moellendorff (Philippines). 220 

 (iii) 



