276 MEMOIRS OF THE CARNEGIE MUSEUM. 
MEASUREMENTS OF Frrst DorsAL VERTEBRA. 
1604, 1703B, 1712, 1718, 1719, 
mm. mm. mm. mm. mm. 
Greatest height from base of centrum to top of spine................. 295 181 260 210 212 
Greatest transverse diameter measured across transverse processes. ... . 190 150 177 145 152 
Greatest antero-posterior diameter measured from front of prezyga- 
pophyses to back of postzygapophyses......................... 110 72 97 68 83 
Length of centrum along floor of neural camal....................... 50 38 47 82 43 
ikenethrofcentrummal ongamienomsinacce pene ere ee 45 28 30 380 28 
Vertical diameter of anterior face of centrum.......................- 75 42 62 45 40 
Vertical diameter of posterior face of centrum....................... 70 40 58 38 40 
Merticalsdiametenionmeunallicanall ae ess ee cree n en ae nen 80 25 33 38 34 
Antero-posterior diameter of prezygapophyses................2..+05- 55 35 40 36 38 
Transverse diameter of prezygapophyses....................+.0005- 4S 35 52 40 47 
Distancelacross prezyeapophysesenseetee cee eee nnn 140 115 138 116 122 
Antero-posterior diameter of postzygapophyses....................-. 40 20 30-35 37 23 
Transverse diameter of postzygapophyses........................... 40 30 40 35 33 
Distancevacross postizycapophyseseane ene eee eee er 112 85 107 95 97 
Transverse diameter of anterior face for head of rib.................. 30 20 30 20 27 
Antero-posterior diameter of anterior face for head of rib............. 80 22 30 20 26 
Vertical diameter of posterior face for head of rib.................... 40 
Horizontal diameter of posterior face for head of rib................. 27 bie os ae at 
Antero-posterior diameter of face for tubercle of rib.................. 40 20 35 30 35 
Transverse diameter of face for tubercle of rib...................... 84 25 30 30 28 
diransverseqdiametenon pedicel Ameena eee eee eee 45 33 45 38 40 
Antero-posterior diameter of pedice! at narrowest point.............. 15 16 15 14 15 
Distance between faces for heads of ribs.....2..-4.32..++--+----- +e" 25 See ais 12 12 
Height of spine from neural canal to extremity...................... 2038 135 175 140 144 
Antero-posterior diameter of spine above neural canal................ 57 33 61 36 38 
Antero-posterior diameter of spine at top.................--...-«--- 82 25 28 19 25 
The Second Dorsal Vertebra. 
The Agate Spring Fossil Quarry yielded seven more or less complete specimens 
of the second dorsal of Moropus. These are numbered in the Catalogue of Verte- 
brate Fossils in the Carnegie Museum as specimens 1604, 17038, 1712, 1713, 
1714, 1716, and 1717. Of these numbers 1716 (see Figs. 45 and 46) is a perfect 
specimen, showing all the articulating surfaces. No. 1712 is complete except for 
the loss of the anterior epiphysis of the centrum, which is present in all the other 
specimens except 1717, from which it has likewise departed. All the other speci- 
mens except 1604 have lost the posterior epiphysis, a sign of immaturity. Of 
No. 1604, the mounted specimen, the centrum with its transverse processes and 
the lower third of the spine is preserved. The upper part of the spine has been 
* All measurements in italics approximate, specimens being restored, or broken. 
