296 MEMOIRS OF THE CARNEGIE MUSEUM. 
Greatest antero-posterior diameter measured from front of pre- 
zygapophyses to back of postzygapophyses.............. 86 62 st. 77 61 
Length of centrum along floor of neural canal................ 56 40 56 42 40 
Length of centrum along inferior surface.................... 45 37 45 40 37 
Vertical diameter of anterior face of centrum................. 50 33 50 50 38 
Transverse diameter of anterior face of centrum.......%...... 62 45 at 54 48 
Vertical diameter of posterior face of centrum................ 60 40 60 50 48 
Transverse diameter of posterior face of centrum including 
facessior: heads ofmibshincericaccacie aoe ne oer eee: 95 70 97 90 70 
Verticalidiameteronhmeuralucanalla eens nee ere a eenre 25 23 25 21 22 
Transverse diameter of neural canal.........:.............. 27 23 a 22 22 
Antero-posterior diameter of prezygapophyses................ 30 22 ae 24 23 
Transverse diameter of prezygapophyses.................... 18 13 ae 15 12 
Distance across prezygapophyses....................-.+-s- 60 45 = 48 44 
Antero-posterior diameter of postzygapophyses............... 23 m22, eZee te 26122 5 20 
Transverse diameter of postzygapophyses................... volts 22 Me UG) ey ee WL, WA ge 14 12 
Distance across postzygapophyses. ..........----++++:-+«--- 57 42 Serr 48 42 
Vertical diameter of anterior face for head of rib............. 20 20 & 17 15 
Horizontal diameter of anterior face for head of rib........... 16 12, a 12 9 
Vertical diameter of posterior face for head of rib............. 27 22 25 24 W?/ 
Horizontal diameter of posterior face for head of rib.......... 23 19 22 21 17 
Antero-posterior diameter of face for tubercle of rib........... 22 17 of 21 15 
Vertical diameter of face for tubercle of rib.................. 20 18 dh 20 17 
itransverserdiametenoipedicelanes ane eee eee 32 20 = 23 20 
Antero-posterior diameter of pedicel.....................-.- 37 28 ae 35 28 
Distance between faces for heads of ribs....................- 28 20 i 20 29 
Height of spine from neural canal to extremity............... 140 eye ae 143 98 
Antero-posterior diameter of spine above neural canal......... 40 32 we 38 30 
Antero-posterior diameter of spine at top..................-- 50 os ie: 38 20 
The Thirteenth Dorsal Vertebra. 
Two specimens representing this bone were found, No. 1604 and No. 1708C. 
Specimen No. 1604 is in almost perfect condition, having sustained practically 
no injury except of a very minor character on the margin of the right postzyga- 
pophysis (see Fig. 58). Specimen Ng. 1703C is likewise a very perfect specimen 
(see Fig. 59), though slightly malformed as if through the dislocation on the right 
side of one of the ribs, for which a false attachment has been formed on the side 
of the centrum below and behind. 
The spine of the thirteenth cervical is broad at its upper extremity, flattened, 
and viewed laterally, produced strongly backward on its upper two-thirds, and 
also produced forward. In specimen 1604 the prezygapophyses are flattened 
surfaces lying on either side of the neural canal, their anterior lips almost reaching 
