1877] 239 
(Cope. 
Measurements. M. 
Length of centrum between anterior convexity and pos- 
HOTIOT MP ics. css 4.4 srsentiewnate neteinaines.oegevs ea endagieateteces .565 
Depth of posterior cup..........-c eee eee eeeec ee eeenes 090 
Diameter of cup { VOrllCal sme ives saditieangs se eeaeeaeeet 810 
AEATIS VOTSE c405°3-5.5 gees cue Sate Sek cad comune 160 
Length of parapophysis........... Pe ee seeee 095 
Width of neural canal................ 2 cece eee Seer, 068 
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 fosse described in other vertebre are present 
in this one, but differs in proportions, owing to the greater size and expanse 
of the superior parts of the neuralarch. 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 Crocodilia. The lateral foramen of 
the centrum is subround. The general surface is smooth. 
Measurements. : M. 
Total elevation of vertebra... 2... ccc ccc cee ec eens T0 
“transverse extent of diapopbyses................ 1.010 
( longitudinal.................. 300 
| vertical of cup..... rere .250 
Diameter of centrum | ttansverse of cup...... See 340 
L “ at middle.......... 205 
Elevation of zygapophysis above centrum............. 810 
Diameter of zygapophysis ees nea a es “avails .. .170 
antero-posterior.........- .090 
Width of neuralcanal......... 0.0 e eee eee sevoinak 085 
Transverse extent of neural spine.........-.-.+++-++- 440 
Length of diapophysis from posterior zygapophysis.... 320 
Antero-posterior width of end of diapophysis......... 1385 
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 
