Plate XL 



Comparison of the Lower Teeth of Adapin;e and Xotharctinte 



1. Pelycodus irigonodus. Amer. Mus. No. 15030. Lower Eocene, Gray Bull Bed.s, Big Horn, Wyoming. Right ramus of man- 

 dible and lower premolar-molar series. X ?. 



2. Adapts jjriscus. Lower Eocene, Egerkingen. Left ramus of mandible with pi-nir. inclusive and alveoli of ps, pa. X f. 

 After Stehlin. 



3. Adajns sciureus. Lower Eocene, Egerkingen. Left ramus of mandible with canine-uij inclusive and alveoli of the central 

 and lateral incisors. X f . After Stehlin. 



4. Adajns magnus. Phosphorites, Larnagol (Lot). Left ramus of mandible with canine — ms inclusive. X f. After Stehhn. 



5. Notharctus matthewi. Amer. Mus. No. 1201L Middle Eocene, Lower Bridger, Wyoming. Left ramus of mandible (reversed), 

 with canine — ms inclusive. Lingual aspect. X ? . 



6. Buccal aspect of the same. 



