1877.] ^&J [Cope. 



Measurements. M. 

 Length of centrum between anterior convexity and pos- 

 terior lip 565 



Depth of posterior cup 090 



t^. . n (vertical 310 



Diameter of cup < 



\ transverse 160 



Length of parapophysis .095 



Width of neural canal 063 



The dorsal vertebra which I suppose the anterior one of those received, 

 is characterized by the lack of the median portion of the neural spine, and 

 the extension outwards of the median lateral processes described above. 

 The diapophyses are much longer, and the zygapophyses more extended 

 transversely. The centrum is constricted at the middle, and especially just 

 behind the convex articular extremity, whose circumference forms a prom- 

 inent rim. The edges of the lip are flared outwards, forming a deep basin, 

 much wider than deep. The fossse described in other vertebrae are present 

 in this one, but differs in proportions, owing to the greater size and expanse 

 of the superior parts of the neural arch. The fossa posterior to the base of 

 the diapophysis is nearly plane, while that at the anterior base is deeply 

 excavated, is narrower, and extends so far along the inferior side of the pro- 

 cess as to give it a semi -circular section near the middle. Distally the di- 

 apophysis has a trialate section, owing to its three longitudinal ridges, and 

 the articular extremity is large and antero-posterior in direction. The pro- 

 cess differs from that of the vertebra next described, in the possession of 

 a facet near the middle of its anterior inferior bounding ridge, which is 

 probably costal, as in the vertebra of Grocodilia. The lateral foramen of 

 the centrum is subround. The general surface is smooth. 



Measurements. M. 



Total elevation of vertebra t 770 



" transverse extent of diapophyses 1.010 



f longitudinal 300 



I vertical of cup 250 



Diameter of centrum -j transverse of CU p _ 340 



' ' at middle 205 



Elevation of zygapophysis above centrum 310 



tv . c t (transverse 170 



Diameter of zygapophysis J 



(antero-posterior 090 



Width of neural canal 085 



Transverse extent of neural spine 440 



Length of diapophysis from posterior zygapophysis 320 



Antero-posterior width of end of diapophysis 135 



A dorsal vertebra from a more posterior position, is characterized by its 

 undivivided transverse neural spine. The entire neural arch is of enor- 

 mous elevation, but as the zygapophyses are above its middle, the neural 

 spine is not as long relatively as in various other genera or as in the 



