SYSTEMATIC REVISION OF THE SUBORDER. 



27 



"There are twenty-seven vertebrae in a continuous series from and including 

 the axis. All bear diapophyses, and all are rib bearing, except perhaps the last two, 

 where they are of reduced size. They are more or less opposite the neural canal as 

 far as the twenty-second centrum. On this vertebra the superior edge is on a level 

 with the floor of the canal, and posterior to this point the diapophyses rise from the 

 centrum. Two sacrals and ten caudals are preserved, and all have diapophyses and 

 neural spines. The centra in this species are rather short, being as deep as long 

 throughout the series, if measured at the middle. The edges are not undulate, as in 

 C. {Embolophorous) limbatus Cope. The intercentra are short and not extended 

 upwards on the sides as in that species." 



Measurements. 



771. 



Length of the quadrate bone -• 0.085 



Width of condyle of quadrate bone (greatest)... .037 

 Length from condyle of internal anterior pro- 

 cess of do 032 



Length from condyle of external anterior pro- 

 cess of do 097 



Length of squamosal bone (vertical) 124 



pterygoid from palatal foramen 116 



Width of pterygoid at middle 090 



Length of internal dentigerous edge of do 070 



posterior dentigerous edge of do 051 



maxillary bone posterior to canine 



brace 181 



Thickness of maxillary bone at canine brace... .020 



Depth of maxillary bone at nostril 016 



Length of premaxillary bone (posterior apex 



restored) 060 



Width of premaxillary bone at third tooth 022 



Diameter of large (first) premaxillary tooth 008 



large maxillary tooth (canine) oog 



small maxillary tooth 006 



Length of crown of last maxillary tooth 009 



twenty-seven continuous cervico- 



dorsal vertebrae 855 



two sacrals 065 



ten caudals 260 



Diameters centrum of axis: 



Antero-posterior 034 



Vertical posteriorly 031 



Transverse posteriorly 030 



Elevation of neural spine from centrum 071 



neural arch from centrum oog 



Width of postzygapophyses 030 



Elevation of neural spine of fourth vertebra .058 



Diameters centrum sixteenth vertebra: 



Antero-posterior 025 



Vertical at end 035 



Diameters end seventeenth centrum: 



Vertical 034 



Transverse 030 



Expanse of postzygapophyses of seventeenth 



vertebra 029 



Diameters twentieth centrum: 



Vertical at end 031 



Antero-posterior 027 



Diameters of twenty-ninth centrum: 



Antero-posterior 0.024 



Transverse behind 035 



Expanse of postzygapophyses of twenty-ninth 



vertebra 024 



Width of sacrum through fixed diapophyses 049 



Diameters centrum twentieth caudal: 



Antero-posterior 025 



Vertical behind 0265 



Transverse behind 0225 



Expanse through diapophyses 047 



Elevation of prezygapophyses (greatest) 039 



Diameters of pelvis: 



Antero-posterior (apex of pubis restored)-. .235 



Vertical through acetabulum 123 



Antero-posterior diameter of ilium at acetabu- 

 lum o8g 



Depth of ischium at posterior edge of acetabu- 

 lum 080 



Length of ischium from acetabulum 117 



femur 179 



Proximal diameter of femur: 



Antero-posterior 075 



Transverse (at middle) 025 



Diameters shaft at middle: 



Transverse 038 



Antero-posterior 031 



Diameters of distal end: 



Transverse 068 



Antero-posterior: 



External condyle 031 



Internal condyle 045 



Length of tibia 150 



Diameters of tibia: 

 Proximal: 



Antero-posterior (middle) 040 



Transverse 057 



Median: 



Antero-posterior 019 



Distal: 



Antero-posterior 026 



Transverse 041 



