6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I3I 



used refer to the number of specimens encountered, giving an indica- 

 tion of the extent of the material upon which identifications are based, 

 as well as some, though generally meager, information on the rela- 

 tive abundance of the various forms within and between the faunas. 

 In certain instances species names are repeated but on a less certain 

 or comparative basis where differences of a minor sort, possibly 

 variant or subspecific in value, are noted between related materials 

 from two different localities. 



From the tabulated data it is seen that the known collections total 

 about 236 generally determinable specimens. Of these 53 are in the 

 collections of the University of Wyoming, with occurrence divided 

 between the vicinity of the saddle and the Titanoides locality. The 

 larger collections are in the U. S. National Museum and represent 

 all four sites. 



Reptilia : 



Sauria : ^ 



Anguid, undct 6 



Mammalia : 



Multituberculata : 



Cf. Ptilodus montanus Douglass i 



Cf. Ectypodiis niusculus Matthew and Granger. ... i 



Cf . Ectypodus ha::cni Jepsen i 



Cf. Anconodon russclli ( Simpson) i 



Marsupialia : 



Peradectcs clegans Matthew and Granger i 



Peradectes paidi, new species 2 



Insectivora : 



Diacodon pcarcei, new species I 



Disonalveus brozimi, new genus and species 4 



Primates : 



Pronothodcctcs, cf. mattJtezin Gidley 4 



Pronothodcctes simpsoui, new species 



Pronothodectes, cf. simpsoni, new species 8 



Plesiadapis, cf. jodinatus Jepsen 



Plesiadapis jepseni, new si)ecies 11* 



Plesiadapis, cf. jepseni, new species 



Carnivora : 



Tricentcs freinoutcnsis, new species 11 



Chriacus, near C. pehidots (Cope) 3 



Chriacus, sp. ( small ) I 



Thryptacodon, cf. aiistralis Simpson 



Thryptacodon demari, new species 



Thryptacodon, cf. demari, new species 2 



Thryptacodon belli, new species 11 



.s o 



^ 1 



