30 EXPLANATION OF PLATES. 



PLATE IV. 



Bones accompanying the cranial fragments of Amblyrhiza quadrans and A. latidens, one-half 

 natural size. 



Fig. 1. Atlas from before ; a, from behind ; b, from below ; c, from above. 



Fig. 2. Axis from left side ; a, from behind. 



Fig 3. Lumbar vertebral centrum from side ; b, from front ; c, from back. 



Fig. 4. Lumbar vertebral centrum ; b, from front; c, from behind. 



Fig. 5. Three vertebra? of sacrum, profile ; a, from below ; b, from front ; c posterior extremity. 



Fig. 6. Caudal vertebra from side ; a, front view. 



Fig. 7. Proximal end of humerus from behind; a, external view ; b, proximal view. 



Fig. 8. Condyles of humerus broken from the shaft from behind ; a, proximal view ; b, distal 

 view. 



Fig 9. Femur without head, external view ; a, internal view ; c, section of shaft at fracture. 



Fig. 10. Proximal portion of another femur, with the great trochanter distorted by pressure, 

 posterior view; a, internal view; c, broken extremity of shaft; b, proximal end of shaft. 



Fig. 11. Distal extremity of a femur, right side ; a, anterior, and b, posterior views. 



Fig. 12. Patellar surface of another femur. 



PLATE V. 



Bones of Amblyrhiza and ruminant, one-half natural size. 



Fig. 1. Anterior part of sacrum of Amblyrhiza Ualidens, which accompanied the bones of 

 Amblyrhiza inundala, viewed from above a, from below ; b, anterior extremity. 



Figs. 2-6. Bones which accompanied the jaws and teeth of Amblyrhiza quadrans and A. latidens. 



Fig. 2. Distal portion of right humerus from front ; a, posterior view. 



Fig. 3. Right acetabulum, external view. 



Fig. 4. Proximal portion of left tibia, interior view ; a, posterior, 6, exterior, and c, proximal 

 views. 



Fig. 5. Distal portion of left tibia with astragalus in place, anterior view ; a, posterior view ; 

 b, distal view of the same tibia alone. 



Fig. 6. Left astragalus from above ; a, from below ; b, from the inner side ; c, distal view ; 

 d, posterior view. 



Fig. 7. Fourth metatarsal bone, which accompanied the sacrum represented in fig. 1, from the 

 front; a, from behind. 



Figs. 8-10. Bones of an adult ruminant described on page 24. 



Fig. 8. Right radius, with parts of the ulna adherent, anterior view ; a, posterior view. 



Fig. 9. Metacarpal cannon bone, anterior view; a, posterior; b, proximal; c, distal views. 



Fig. 10. Left proximal phalange of the same, from above j a, from below; 6, proximal ; c, distal 

 views. 



