CONTENTS 



PAGE 



Introduction: The division of the Orthurethra into families; 



The family Pupillidae and its subfamilies . . . vii 



Description of Genera and Species: — 



Family Strobilopsidae 1, 193 



Genus Strobilops Pils 12, 194 



Family Pupillidae, Appendices 63, 169 



Genus Gastrocopta WoU 63, 117, 169, 203 



Genus Gyliotrachela Tomlin 73 



Genus Fauxulus Schauf 73, 121 



Genus Abida Leach 76, 122, 201 



Genus Granopupa Bttg 77 



Genus Chondrina Reichenb 78, 122, 201 



Genus Pupoides Pfr 80, 137, 200 



Genus Microstele Bttg 137 



Genus Pupilla Leach 81, 135, 199 



Genus Lauria Gray 86, 138, 170 



Genus Orcula Held 88, 123, 172 



Genus Vertigo Miill 93, 208 



Genus Truncatellina Lowe 105, 171, 208 



Genus Columella Westerl 109, 172, 208 



Genus Sterkia Pils 109 



Genus Nesopupa Pils 110, 204 



Genus Bothriopupa Pils 114, 207 



Genus Pupisoma Stol 114 



Geographic Distribution of Pupillidae 139 



Family Valloniidae 173 



Genus Vallonia Risso 174, 195 



Genus Acanthinula Beck 174, 196 



Genus Zoogenetes Morse 175 



Genus Spermodea Westerl 176 



Genus Planogyra Morse 176, 197 



Genus Spelaeodiscus Brusina 176 



Family Pleurodiscidae 177 



Genus Pleurodiscus Wenz 178, 198 



Genus Pyramidula Fitz 182 



Review of the Anatomy of Pupillidae and Related Groups, by 



H. Burrington Baker 191 



Explanation of Plates 210 



Index .... - 221 



(v) 



