664 THE BEIDGEK EPOCH. 



Measurements. 



H. 



Length of the cervical series 175 



Leugth of atlas between articular faces 046 



Length of base of transverse process 035 



Length of transverse process 020 



Diameter neural canal in front 021 



Diameter of anterior expanse 050 



Diameter of total expanse 099 



Length axis along basis neural arch 021 



Elevation crest (rectangular) from posterior zygapophysis 036 



Length parapophysis of fifth cervical on margin 051 



Extent zygapophyses of fifth cervical on margin 048 



Expanse zygapophyses of fifth cervical on margin behind 044 



Elevation neural spine of C. vi. 056 



Elevation neural spine of C. vii 075 



Length centrum below ofC. Tii 028 



Diameter of cup, about 032 



The measurements indicate that the neural spines of the sixth and 

 seventh are quite elevated, the latter neai-ly equal to that of the first dorsal 



The spines of the dorsal vertebrae are elevated in the front of the series, 

 rising some distance above the scapulae. They shorten and widen rapidly 

 from the middle of the series backward. The extremities of all from the 

 scapula posteriorly are turned forward. The metapophyses are conspicu- 

 ously elevated above the diapophysis on the eleventh dorsal, and on the 

 eighteenth their elevation is about A that of the neural spine. The diapo- 

 physis is extended beyond the tubercular articulation, on the eighteenth 

 dorsal ; the extension and expansion increases rapidly on the lumbars. On 

 the fourth they are as wide at the base as .6H the length of the centrum, 

 and maintain their width, being directed anteriorly. On the sixth and 

 seventh they are still wider and longer, and very thin. They present a 

 projecting transverse surface backward one-fourth the length from the base 

 for articulation Avith the seventh lumbar and first sacral respectively. The 

 centra of the lumbars are depressed and slightly opisthocoelous, exce^it the 

 last, which is flat. They are contracted and keeled below. 



The sacrum is long and narrow, and thoroughly coossified in the 

 specimen. The diapophysis of the first and part of that of the second give 

 attachment to the ilium. The intervertebral foramina are rather small. 



