7 6 



SCOTT. 



EXPLANATION OF PLATE II. 



Atlas, side X 2 /$. 

 Atlas, rear X %. 

 Axis, side X 2 A- 



Cope collection. 

 Cope collection. 

 o. odontoid process; 



/'• 



Fig. 

 canal ; 

 Fig. 17 

 Fig. 18 

 Fig. 19 

 Fig. 20 

 Fig. 21 

 Fig. 22 



Fig. 24. 

 Fig. 25. 

 Fig. 26. 

 Fig. 27. 



Fourth cervical, side X %■ 

 Sixth cervical, side X 73. 



Sixth cervical, rear X %• 

 Seventh cervical, side X %. 

 Seventh cervical, base X %. 

 First dorsal, base X %■ 

 Ninth dorsal, side X %■ 



Lumbar vertebra, side X %• 



vertebrarterial 



pt. z. post- 



FlG. 10. Pcebrotherium Wilsoni. Intracranial cast. cb. cerebellum; 1. median 

 convolution; 2. medi-lateral; 3. lateral; 4. suprasylvian. 



Fig. 11. Pcebrotherium labiatum. Atlas, base X %. Cope collection, v. c. ver- 

 tebrarterial canal. 



Fig. 12. Pcebrotherium labiatum. 



FlG. 13. Pcebrotherium labiatum. 



Fig. 14. Pcebrotherium labiatum. 

 postzygapophysis. 



Fig. 15. Pcebrotherium labiatum. 



16. Pcebrotherium labiatum. 

 v. c! accessory foramen. 



17. Pcebrotherium labiatum. 



18. Pcebrotherium labiatum. 

 Pcebrotherium labiatum. 

 Pcebrotherium labiatum. 

 Pcebrotherium labiatum. 

 Pcebrotheriwn labiatum. 



zygapophysis. Cope collection. 

 FlG. 23. Pcebrotherium labiatum. 

 Pcebrotherium labiatum . 

 Pcebrotherium labiatum. 

 Pcebrotherium labiatum. 

 Pcebrotherium labiatum. 

 external tuberosity; i. t. internal tuberosity; be. I. bicipital tubercle. 

 FlG. 28. Pcebrotherium labiatum. Humerus, distal end, natural size. 

 FlG. 29. Pcebrotherium labiatum. Ulno-radius, front X Yt- R. radius; U. ulna. 

 Fig. 30. Pcebrotherium labiatum. Ulno-radius, rear X %■ 



Fig. 31. Pcebrotherium labiatum. Ulno-radius, distal end, natural size. sJ U c. 1 

 facets for the scaphoid, lunar, and cuneiform. 



FlG. 32. Pcebrotherium labiatum. Ulno-radius, proximal end, natural size. 



Pcebrotherium labiatum. Carpus, front. Cope collection, s. scaphoid; 

 cuneiform; /(/.trapezoid; m. magnum; u. unciform; natural size. 

 Pcebrotherium labiatum. The same, proximal face. 

 The same, distal face. 

 Metacarpals, front X Yf 

 The same, proximal end, natural size. 

 Femur, proximal end, front view, natural size. 



Lumbar vertebra, rear X %• Cope collection. 

 Scapula, side X Yz. c. coracoid; a. acromion. 

 Scapula, distal end, natural size. 

 Humerus, front X Yz- e - '• external tuberosity. 

 Humerus, proximal end, natural size. e. t. 



Fig. 33. 

 lunar ; c. 

 Fig. 34. 

 Fig. 35. 

 Fig. 36. 

 Fig. 37. 

 Fig. 38. 



Pcebrotherium labiatum. 

 Pcebrotherium labiatum. 

 Pcebrotherium labiatum. 

 Pcebrotherium labiatum. 

 Cope collection. 



Fig. 39. Pcebrotherium labiatum. 



The same, proximal end, top view. 



