CONTENTS. 



PAGE 



Family UROCOPTIDyE Pilsbry & Yanatta vii 



Definition of the family vii 



General morphology of Urocoptidae 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 Urocoptidae 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^OSTOA Andraee ii 



Genus PERRIERIA Tapparone Canefri ,. 189 



Cylindrelloid genera of Stenogyrine affinities: Cceliaxis, 



Pyrgina, Thomea, Distaechia, Cylindrellina 194, 195 



Index to Urocoptidae and Megaspiridae 196 



Family ACHATINID^E. 

 Genus PSEUDACHATINA Albers .. ., 205 



