OSTEOLOGY OF E. DOLLOVIANUS, COPE 



15 



The spine of the third cervical (Fig. 12) is quite slender and, 

 though incomplete at the upper end, was evidently quite short. 

 The spine is curved forward, so that it lay close to the spine of 

 the axis, and its base is quite narrow, as it is sharply pinched in 

 by a deep fossa on each side. The anterior and posterior zyga- 

 pophyses are well developed, and the faces are nearly horizontal, 

 so that in the natural condition of the bone they looked straight 

 up and down. The transverse process was attached to the base 

 of the neural spine and to a ridge rising from the upper portion 



a b 



Fig. 12. — Third cervical, a, from above ; b, from the side. 



^ natural size. 



of the centrum ; the lower end of this ridge is supported by 

 slight ridges running toward the anterior and posterior faces of 

 the centrum. These last ridges assume considerable importance 

 in the more posterior vertebrae. The transverse process is pres- 

 ent on the vertebrae, but broken from position and displaced 

 somewhat to the rear. It has been figured in outline in its 

 proper position, so that the nature of the posterior portion of 

 the vertebra may be seen, but the dimensions and form are cor- 

 rect as figured. The process starting from the base of the spine 

 decurved rapidly, and its distal face reached to the lower edge 

 of the centrum. The notochordal portion of the centrum is 

 confined to the upper half, and the lower is occupied by a narrow 

 and prominent keel. The posterior face is somewhat lower than 



