OSTEOLOGY OF E. DOLLOVIANUS, COPE 



19 



verse process lacks something of the thin plate extending from 

 its anterior edge which gives it the very broad appearance in the 

 anterior cervicals and it is much stouter. In this vertebra for 

 the first time the suture between the neural arch and the centrum 

 is quite evident. On the 

 upper edge of the anterior 

 face of the centrum near 

 the sides are small promi- 

 nences seemingly articu- 

 lar in nature, but I can 

 find no corresponding 

 structure on the posterior 

 faces of any of the verte- 

 brae. The base of the 

 neural spine is much 



stouter than in the pre- a c 



ceding vertebra, and the Fig. 15.— An anterior dorsal vertebra, the 



spine was orobablv much twelfth of the restoration, a, from the side; b, 



, , anterior face of the centrum ; c, profile of the 



more elevated. , . ,1 2/^1- 



centrum from below. % natural size. 



MEASUREMENTS OF THE SEVENTH CERVICAL. 



Length along the bottom line of the centrum - - - 0.029'" 



Height of centrum as in the sixth ------ 0.032 



Horizontal and vertical diameters of the posterior face of the cen- 

 trum ---..---.- 0.030 

 Width of the post-zygapophyses ------ 0.033 



The next vertebra (Fig. 15) probably belongs farther back 

 in the series. It is the twelfth of the restoration. The numbers 

 used below are those of the restoration. This vertebra is typical 

 ■of the dorsal series. It differs markedly from the vertebrae 

 described as cervical, and not least in the fact that the neural 

 ■arch and spine are separate from the centrum. The centrum is 

 ■more high than long, and the keel is very prominent, forming at 

 ■least half of the vertical extent of the centrum. The transverse 

 process rises from the base of the neural spine and probably 

 extended almost straight outward (this is true in Dinictrodoii) . 

 The distal end of the transverse process is missing, but the base 



