CONTENTS. 



PAGE 



Family UROCOPTHLE Pilsbry & Vanatta vii 



Definition of the family vii 



General morphology of Urocoptidas viii 



Evolution of the group, and significance of its pres- 

 ent characteristics xv 



Geological and zoogeographical notes xx 



Historical sketch of the literature of Urocoptidae . . xxiv 



Classification of Urocoptidse xxix 



Keys to genera xxxi 



Descriptions of genera and species. 



Genus ANOMA Albers ,. .1, 195 



Genus BRACHYPODELLA Beck , 40, 195 



Genus PINERIA Poey 108 



Genus MACROCERAMUS Guilding , 113 



Genus MICROCERAMUS Pilsbry & Vanatta 151 



Undetermined Urocoptidae , 173 



Family MEGASPIRID^ Pilsbry 175 



Genus CALLIONEPION Pilsbry & Vanatta 177 



Genus MEGASPIRA Lea. ., 180 



Genus EOMEGASPIRA Pilsbry 187 



Genus PAL^EOSTOA Andraee ii 



Genus PERRIERIA Tapparone Canefri ,.- 189 



Cylindrelloid genera of Stenogyrine affinities: Cceliaxls, 



Pyrgina, Tlwmea, Distcechia, Cylindrellina 194, 195 



Index to Urocoptidse and Megaspiridas 196 



Family ACHATINID^. 

 Genus PSEUDACHATINA Albers , 205 



(v) 



. 



