Plate 9 



1, Plesiadapis gidleyi (Matthew), left upper molar, U.S.N.M. no. 10765, crown 



view. From the Tiffanj- beds near Ignacio, Colo.; for comparison with 

 Pronolhodedes. 



2, Pronothodecles mattheivi. Gidley, right P^-M-, type (U.S.N.M. no. 9547), crown 



view. Gidley Quarry. 



3, Plesiadapis gidleyi (Matthew), right P^, U.S.N.M. no. 10659, crown view. 



From the Tiffany beds near Ignacio, Colo.; for comparison with Prono- 

 thodecles. 



4, Plesiadapis rex (Gidley), left lower molar, type (U.S.N.M. no. 9828), crown 



view. Gidley Quarry. 



5, Palaechthon aUicuspis Gidley, right M'--, paratype (U.S.N.M. no. 9550), 



crown view. Gidley Quarry. 



6, Palaechthon aUicuspis Gidley, right M'--, paratype (U.S.N.M. no. 9551), 



crown view. Gidley Quarry. 



7, Paromomys depressidevs Gidley, right P^-M^, type (U.S.N.M. no. 9546), 



crown view. Gidley Quarry. 



8, Undetermined, probably primate upper incisor, U.S.N.M. no. 10090, lingual 



view. Gidley Quarry. 



9, Undetermined, probably primate upj^er incisor, U.S.N.M. no. 10010, lingual 



view. Gidley Quarry. 



10, Undetermined, probably primate upper incisor, U.S.N.M. no. 9928, lingual 



view. Gidley Quarry. 



11, Vrohixhly Pronothodectes matthewi Gidley, upper incisor, U.S.N.M. no. 10005, 



lingual view. Gidley Quarry. 



12, Probably Pronothodecles matthewi Gidley, upper incisor, U.S.N.M. no. 10044, 



lingual view. Gidley Quarry. 



13, Undetermined lower incisor, possibly Plesiadapis rex, U.S.N.M. no. 9827, 



lateral view. Probably Loc. 13. 



14, Undetermined, possibly multituberculate lower incisor, U.S.N.M. no. 9552, 



lateral view. Gidley Quarry. 



15, Undetermined, pair of upper incisors, U.S.N.M. no. 9917, lingual view. 



Gidley Quarry. 



16, Plesiadapis gidleyi (Matthew), poorly preserved upper incisor, U.S.N.M. 



no. 10639, lingual view. From Tiifany beds, 5^2 miles east of Bayfield, 

 Colo. 

 (All figures aVjout four times natural size; after Gidley.) 



