HOLLAND AND PETERSON: OSTEOLOGY OF THE CHALICOTHEROIDBEA. 
MEASUREMENTS OF FIFTEENTH DorRSAL VERTEBRA.*® 
1604, 
mm 
Greatest height from base of centrum to top of spine..... 212 
Greatest transverse diameter measured across transverse 
OEOCE SSS psc ateretone aero eat open TERI Ec ree 150 
Greatest antero-posterior diameter measured from front 
of prezygapophyses to back of postzygapophyses... . 92 
Length of centrum along floor of neural canal........... 62 
Length of centrum along inferior surface............... 48 
Vertical diameter of anterior face of centrum............ 61 
Transverse diameter of anterior face of centrum......... 68 
Vertical diameter of posterior face of centrum........... 63 
Transverse diameter of posterior face of centrum........ 88 
Vertical diameter of neural canal...................... 22 
Transverse diameter of neural canal................... 27 
Transverse diameter of prezygapophyses............... we, We, I 
Antero-posterior diameter of prezygapophyses........... 25 
Distance across prezygapophyses...................... 67 
Antero-posterior diameter of postzygapophyses.......... ey Diy I 
Transverse diameter of postzygapophyses.............. 26 
Distance across postzygapophyses above..............- 62 
Vertical diameter of anterior face for head of rib........ 23 
Horizontal diameter of anterior face for head of rib...... 20 
Transverse diameter of pedicel above transverse process. . 14 
Antero-posterior diameter of pedicel................... 42 
Distance between anterior face for head of rib and pos- 
COLIOTMMAT OUMee Ne Keer Samah emcee cal, a esa am byes 50 
Height of spine from neural canal to extremity.......... 130 
Antero-posterior diameter of spine above neural canal... . 46 
Antero-posterior diameter of spine at top, approximate. .. 62 
Height of metapophysis above prezygapophysis......... 48 
1703C, 
mm. 
155 
120 
81 
52 
> NG) se, WB I 
1, 2, I, 
38 
OL DE, Tl, 
22 
42 
18 
14 
12 
30 
40 
111 
30 
45 
36 
The Lumbar Vertebre. 
Four series of lumbar vertebre in more or less perfect condition were recovered. 
In the case of No. 1604, the mounted specimen, the last three lumbars were missing, 
but specimen No. 1708 provided six centra of a specimen of almost identically the 
18 
22 
1708, 
mm. 
62 
137 
WG me 1, 1 
. 25 
. 25 
303 
1715, 
mm. 
132 
21 
16 
48 
20 
20 
42 
14 
14 
14 
25 
34 
90 
32 
30 
32 
16 
same size and undoubtedly belonging to the same specieés, which were found lying 
collocated in such a manner as not to leave any doubt that they belonged to one 
individual. The centra of three of these specimens, the last of which preserved the 
38 Figures in italics denote approximate measurements. 
39 Obtained by measuring from middle of neural canal to end of left transverse process and multiplying 
by 2. The right transverse process is broken off at the tip. 
