Plate XXXIX 



Comparison of Adapis and yotharcfiis. — Upper and Lower Cheek Teeth, Crown View 

 All figures three times natural size. 



1. Notharctus crassus. Amer. Mus. No. 11982. Middle Eocene, Upper Bridger, Henry's Fork, Wyoming. Right maxilla with 

 canine and p^-m'. P', p^ not preserved. The molars have large mesostyles and pseudo-hypocones. 



2. Adapis ?nagnm. Amer. Mus. No. 10511. Upper Eocene, Euzet les Bains, Gard, France. Right maxilla with p^-m^. The 

 molars have no mesostyles and the hypocones are continuous with the cingulum. 



3. Notharctus osbonii. Amer. Mus. No. 11466. Middle Eocene, Lower Bridger, Wyoming. Right ramus raandibuli with canines- 

 to m.i inclusive. 



4. Adapis parisiensis. Amer. Mus. No. 10007. Right ramus mandibuli with canine, alveolus of pi and p.:-m.5 inclusive. 



5. Adapis magnus. Amer. Mus. No. 10011. Right ramus mandibuli with p4-m3 inclusive. 



