78 



SCOTT. 



EXPLANATION OF PLATE III. 



Fig. 40. 



Fig. 41. 

 F. fibula. 



Fig. 42. 



Fig. 43. 

 navicular ; 



Fig. 44. 



Pcebrotherium labia turn . 

 Pcebrotherium labia turn . 



Tibia, front Xy 2 . 



The same, distal end, natural size. 



T. tibia; 



Pcebrotherium labiatum. 

 Pcebrotherium Wilsoni. 



The same, proximal end, natural size. 



Tarsus, front, natural size. cb. cuboid; 

 -.2+3, coalesced meso- and ento-cuneiforms. 

 Pcebrotherium Wilsoni. The same from the inner side. 



II. rudiment 



of second metatarsal ; III. third metatarsal. 



Fig. 45. Pcebrotherium Wilsoni. 



Fig. 46. Pcebrotherium Wilsoni. 

 facet; a.' a." astragalar facets. 



FlG. 47. Pcebrotherium Wilsoni. 

 size. 



Fig. 48. 



Fig. 49. 



Fig. 50. 



Fig. 51. 



Fig. 52. 



Fig. 53. 



Astragalus, plantar surface, natural size. 

 Calcaneum, tibial side, natural size. fb. fibular 



Cuboid and navicular, proximal surface, natural 



Pcebrotherium labiatum . 

 Pcebrotherium labiatum. 

 Pcebrotherium labiatum. 

 Pcebrotherium labiatum. 

 Procamelus occidentalis. 



Phalanges of manus, natural size. 



First phalanx, proximal end. 



Metatarsals, front X y 2 . 



The same, proximal end, natural size. 



Manus, front X Y 2 . After Cope. 

 Procamelus sp.? Tarsus, front X^. This specimen is of an undeter- 

 mined species from the Loup Fork of Eastern Oregon, which was presented to the 

 Princeton Expedition of 1S90 by Mr. William Day. 



