CONTENTS Vn 



Part 2: Classification and description of mammals — Continued. Page 



Order Condylarthra Cope 216 



Family Hyopsodontidae Lydekker 224 



Subfamily Mioclaeninae Matthew 232 



Choeroclaenus, new genus 232 



Genus Ellipsodon Scott 233 



Genus lAtaletes Simpson 238 



Subfamily Hy opsodontinae Trouessart 241 



Genus Litomylus Simpson 241 



Genus Haplaletes Simpson 243 



Family Phenacodontidae Cope 245 



Genus Tetraclaenodon Scott 246 



Genus Gidleyina Simpson 250 



Family Periptychidae Cope 255 



Subfamily Anisonchinae Osbom and Earle 255 



Genus Coriphagus Douglass 257 



Genus Anisonchus Cope 262 



Order Pantodonta Cope 265 



Family Pantolambdidae Cope 269 



Genus Pantolambda Cope 269 



Pantolambda or allied genera, species undetermined 271 



Literature cited 272 



Index. 279 



