l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I3I 



1929. A new Paleocene uintathere and molar evolution in the Amblypoda. 



Amer. Mus. Nov., No. 387, pp. 1-9, figs. 1-9. 

 1933- Braincasts of Phenacodus, Notostylops, and Rhyphodon. Amer. Mus. 



Nov., No. 622, pp. 1-19, figs. 1-3. 



1935. The Tiffany fauna, upper Paleocene. 3. — Primates, Carnivora, Con- 



dylarthra, and Amblypoda. Amer. Mus. Nov., No. 817, pp. 1-28, 

 figs. 1-14. 



1936. A new fauna from the Fort Union of Montana. Amer. Mus. Nov., 



No. 873, pp. 1-27, figs. 1-16. 

 1937a. The Fort Union of the Crazy Mountain field, Montana, and its 



mammalian faunas. U. S. Nat. Mus. Bull. 169, pp. 1-287, figs. 1-80, 



pis. I-IO. 

 1937b. Notes on the Clark Fork, upper Paleocene fauna. Amer. Mus. Nov., 



No. 954, pp. 1-24, figs. 1-6. 



EXPLANATION OF PLATES 



Plate i 



primates, anacodon?, and probathyopsis ? from the almy paleocene 



Fig. I. Anacodon? nexus, new species: Mi and M2 (U.S.N.M. No. 21282), 



type specimen, occlusal view. Natural size. 

 Figs. 2 and 3. Probathyopsisf, sp. : 2, Upper premolar (U.S.N.M. No. 21283), 



occlusal view; 3, upper premolar (U.S.N.M. No 21284), occlusal view. 



Natural size. 

 Fig. 4. Carpolestes, cf. dubius Jepsen : P* (U.S.N.M. No. 21280), labial (left) 



and lingual views. Six times natural size. 

 Figs. 5-8. Plesiadapis cookei Jepsen : 5 and 7, Left ramus of mandible 



(U.S.N.M. No. 20785), (5) occlusal view, twice natural size, and (7) lat- 

 eral view, natural size; 6 and 8, left ramus of mandible (U.S.N.M. No. 



16698), (6) occlusal view, twice natural size, and (8) lateral view, natural 



size. 

 Fig. 9. Plesiadapis? pearcei, new species: Right ramus of mandible (U.S.N.M. 



No. 20787), type specimen, occlusal and lingual views. Three times natural 



size. 

 Fig. 10. Plesiadapis riibcyi Gazin: Right ramus of mandible (U.S.N.M. No. 



16696), type specimen, occlusal and lingual views. Three times natural 



size. 



Plate 2 

 condylakths from the almy paleocene 



Figs. I and 2. Ectocion ralstonensis Granger: i. Skull (U.S.N.M., No. 20736), 

 lateral and ventral views. Natural size; 2, left ramus of mandible 

 (U.S.N.M. No. 20736), lateral and occlusal views (Mi restored from right 

 side). Natural size. 



Figs. 3 and 4. Phenacodus almicnsis Gazin : 3, Right upper cheek tooth series 

 (U.S.N.M. No. 16691), type specimens, occlusal view (M" restored from 

 left side) ; 4, left ramus of mandible (U.S.N.M. No. 20643), occlusal view. 

 Natural size. 



Fig. 5. Phenacodus primaevus Cope: Left ramus of mandible (U.S.N.M. 

 No. 21287), occlusal view. Natural size. 



