Plate XXXVIII 



Comparison of Adajds and Pclymdvs.— 'Right Lower Premolar-molar series and Ramus of Mandible, Lingual Aspect 

 All figures three times natural size. 



1. Pelycodus trigonodus. Amer. Mus. No. 16843. Lower Eocene, Middle Gray Bull Beds, Bighorn, Wyoming. 



2. Adapis magnus. Amer. Mus. No. 10511. Upper Eocene. Euzet les Bains, Gard, France. 

 3- Adapis parisieiisis . Amer. Mus. No. 10007o. 



