CAMBRIDGE UPPER GREENSAND. 19 
Case. Comp. Tablet. Specimen. 
J 2d 2 1 —4 a cervical, dorsal, early caudal or sacral, and 
late caudal vertebrae reputed associated. 
No. 1, posterior cervical, shows the two 
tubercles for the rib, one on the side of 
the centrum in front, and the other given 
off from under the prozygapophysis which 
does not extend in front of the centrum. 
The intervertebral surfaces are flattened 
and slightly concave ; between them • the 
centrum is much compressed towards the 
base. 
2d 3 1—7 an associated series of posterior dorsal vertebrae 
from Burwell presented by C. M. Doughty 
Esq. The centrum is rounded on the 
under side. 
2d 4 1—10 dorsal vertebrae. No. 1 is early dorsal and 
has the neural arch preserved ; it shows 
the lateral platform at the base of the 
neural spine; from the middle of the under¬ 
side of the platform is given off the pro¬ 
cess which supports the rib. The centrum 
is laterally compressed and forms a sharp 
ridge on the visceral aspect. 
2d 5 1 —5 early caudal vertebrae. Large bones with the 
centrum oblique in side outline, the 
posterior intervertebral surface being much 
larger than that in front, to give attach¬ 
ment at its inferior margin to the chevron 
bone. The centrum is rather short from 
front to back, and at its junction with the 
neural arch gives off a strong transverse 
process. The neural arch is small. 
2d 6 1—7 posterior caudal vertebrae. The centrum is 
more elongated than in early caudal ver¬ 
tebrae ; ridges are developed on the sides 
and under surface of the centrum. The 
chevron bones still continue, the facets 
at the back of the centrum being close 
2—2 
