NEW PALEOCENE MAMMALS — SIMPSON" 223 



Order Multituberculata: 

 Ptilodontidae: 



Ptilodus montanus Douglass, 1908. 



Ptilodus douglassi, new species. 



Ptilodus gidleyi, new species. 



Ptilodus sinclairi, new species. 



Ectypodus grangeri, new species. 



Ectypodus russelli, new species. 



Ectypodus silberlingi, new species. 



Parectypodus jepseni, new species. 



Eucosmodon sp. 

 Order Insectivora: 

 ?Deltatheridiidae: 



Gelastops parous, new genus and species. 

 Leptictidae: 



Myrmecohoides montanensis Gidley, 1915. 

 V Prodiacodon concordiarcensis, new species. 



■'' Leptacodon ladae, new species. 



Leptacodon munuscidurn, new species. 



Emperodon acmeodontoides, new genus and species. 

 ' Nyctitheriidae: 



\ Stilpnodon simplicidens, new genus and species. 



X Pantolestidae: 



Aphronorus fraudalor, new genus and species. 

 ^' Palaeosinopa diluculi, new species. 



ft Mixodectidae: 



i. Eudaemonema cuspidaia, new genus and species. 



f Order Primates: 

 i Plesiadapidae: 



] Pronothodedes matthewi Gidley, 1923. 



!'. Carpolestidae: 



t Elphidotarsius florcncae Gidley, 1923. 



J ?AnaptomoriDliidae: 



I Paromomys maturus Gidley, 1923. 



Paromomys depressidens Gidley, 1923. 



Palaechthon aliicuspis Gidley, 1923. 



Palenochtha minor (Gidley, 1923), new genus 

 Order Taeniodonta: 

 Styiinodontidae: 



Conoryctes comma Cope, 1881. 



Psittacotherium mxdtijragum Cope, 1882. 

 Order Carnivora: 

 Arctocyonidae: 



Claenodon ferox (Cope, 1883). 



Claenodon montaneriMs (Gidley, 1919). 



Claenodon silberlingi (Gidley, 1919). 



Claenodon latidens (Gidley, 1919). 



Claenodon vecordensis, new species. 



Deuterogonodon montanus, new genus (Simpson) and species (Gidley). 



Prothryptacodon furens, nev/ genus and species. 



Chriacus pusillus, new species. 



Chriacus pug.nax, new species. 



Metachriacus punitor, new genus and species. 



