OSTEOLOGY OF E. DOLLOVIANUS, COPE 



21 



MEASUREMENTS OF DORSAL VERTEBRAE. 



Length along bottom line of thirteenth ----- 0.0275'" 



Length along bottom line of fourteenth . . . . 0.0245 



Length along bottom line of fifteenth ----- 0.032 



Length along bottom line of sixteenth - - . . 0.031 



Length along bottom line of seventeenth . - - - 0.0325 



Length along bottom line of eighteenth . - . - 0.034 



The nineteenth vertebra (Fig. 17) is characterized by the 

 diminution of the keel. The 

 lower edge of the centrum is 

 rounded and the keel is indi- 

 cated by a narrow line only. 

 The anterior face of the cen- 

 trum is rounded and quite 

 similar to the posterior, there 

 being but a small facet for 

 the intercentrum. The zyga- 

 pophyses are narrow and 



nearly horizontal, and the 



Fig. 17. — A posterior dorsal, the nine- 

 transverse process stood out ^^^^^j^ ^f ^^^ restoration, a, from the side ; 



at nearly right angles to the b, anterior face of the centrum. % natural 



body of the centrum. ^'^^• 



MEASUREMENTS OF THE NINETEENTH VERTEBRA. 



Length along bottom line of the centrum ----- 0.035'" 



Horizontal diameter of face of centrum . . - - 0.029 



Vertical diameter of face of centrum ----- 0.028 

 Vertical height of centrum to base of notch beneath post- 



zygapophyses - -'- - - - - - - 0.029 



The twejitieth to the twenty -fourth vertebrae, inclusive, are 

 quite similar to the nineteenth, but show a gradual decrease in 

 length, as shown by the measurements below: 



MEASUREMENTS. 



Length along bottom line of twentieth 

 Length along bottom line of twenty-first 

 Length along bottom line of twenty-second 

 Length along bottom line of twenty-third 



0.036'! 

 0.037 



0.033 

 0.030 



The edge of the anterior face of the centrum of the twenty- 

 fourth vertebra is expanded into a slight face for the capitulum 



