178 Annals of the Carnegie Museum. 



The Candals (Fig. 25). — The caudal vertebrae which were discovered 

 with the material under discussion belong to the proximal series and 

 conform in shape to the posterior sacrals. The gradual tapering 

 indicates a moderately long tail, which, however, was perhaps shorter 

 than in Merycoidodon culbertsoni. 



M EASUREMENTS. 



No. 1080 



(Type) No. 1081, 



Mm. Mm. 



Length of vertebral column from atlas to end of sacrum 



approximately 1,320 



Length of cervical region 258 265^ 



Length of dorsal region, approximately 480 535^ 



Length of lumbar region, approximately. 270 300 



Length of sacrum 245 270 



Atlas, greatest antero-posterior diameter 77 78' 



Atlas, greatest transverse diameter 176 180' 



Atlas, greatest vertical diameter 60' 



Atlas, greatest transverse diameter of cotyles for occipital 



condyles 75 78 



Atlas, greatest vertical diameter of cotyles 35' 



Axis, greatest vertical diameter 90 90' 



Axis, greatest transverse diameter 94 94' 



Axis, antero-posterior diameter of centrum with odontoid 



process 65' 



Axis, antero-posterior diameter of odontoid process 20' 



Axis, vertical diameter of centrum, approximately 28' 



Axis, transverse diameter of centrum 34' 



Axis,, transverse diameter of centrum, including articula- 

 tions for atlas 72 72' 



Third cervical, greatest antero-posterior diameter 62' 



Third cervical, transverse diameter across transverse pro- 

 cesses 1 10 102' 



Third cervical, antero-posterior diameter of centrum, pos- 

 teriorly 35' 



Third cervical, transverse diameter of centrum 34' 



Third cervical, vertical diameter of centrum 29 



Seventh cervical, greatest height including neural spine, 



approximately 145 145' 



Seventh cervical, antero-posterior diameter of centrum. . . 32' 

 Seventh cervical, transverse diameter of centrum, anter- 

 iorly 26' 



Seventh cervical, vertical diameter of centrum, anteriorly 26^ 



First dorsal, greatest height when in position in the skeleton 194 197^ 



' Indicates that the measurements were taken from No. 1047. 



