THE CAMBRIDGE GREENSAND. 635 
Fig. 2. Left lateral aspect of fourteenth to eighteenth centrums of the series, 
showing the somewhat compressed appearance of upper parts of the 
bodies of the last five dorsal vertebre. 
2a. Visceral aspect of the last dorsal vertebra, No. 18. 
2 b. Posterior (?) articular end of the same centrum, No. 18. 
3. The sacrum, showing the neural or superior surface, and giving evi- 
dence of the great expansion of the spinal cord in the region of the 
second and third sacral vertebrz. The outlets for the escape of the 
sacral nerves at the sides of the centrum are best seen in the first 
three vertebrae. 
4. Dorsal surface of vertebral end of a sacral rib, showing the massive end 
for attachment to the sides of the centrums of the second and third 
vertebra. Its worn upper surface gave attachment to the neural 
arch. 
5. Left lateral aspect of a sequence of six early caudal vertebrae numbered 
25 to 30, showing decreasing depth of the centrum posteriorly, and 
diminishing size in the surface for the attachment of the sacral rib 
which remains in union with the 30th vertebra. The cheyron facet, c, 
also diminishes in size, 
5 a. Posterior articular surface and facet for the chevron bone of the 
vertebra No. 26. 
PLATE XXXV. 
. 1. Internal aspect of anterior end of the left ramus of the lower jaw, 
showing the broken inferior border and the imperfectly preserved 
sockets for the teeth on the superior border. 
1 a. Outline of the fractured posterior end of the same specimen. 
2, External aspect of left coracoid, showing the coracoid foramen, and (a) 
articular surface for the humerus, and (0) the surface for union with 
the scapula. The broken superior margin of the bone is also shown. 
3. External surface of proximal end of right scapula, showing the con- 
stricted upper part of the bone, (a) the articular element in the 
glenoid cavity for the humerus, (0) the greatly elevated spine, and 
(c) the compressed articular surface for the coracoid. 
4, Superior surface of proximal articular end of right humerus, showing (a) 
the fractured radial side of the bone, (2) the articular head, and (ec) 
the extension of the proximal articulation onto the compressed 
ulnar border. 
5. Distal portion of the same bone with only a minute trace of the distal 
articular surface. It shows the widening outline of the distal end, 
but not the radial crest, which is concealed behind the bone. 
6. External aspect of proximal end of left femur, showing (a) the curved 
proximal articular surface, and (4) the proximal styloid anterior 
trochanter, which is fractured proximally. 
7. Outline of the distal end of the shaft of tae same bone, showing (a) the 
intercondylar groove on the inferior surface. 
8. External or fibular-posterior aspect cf two portions of the shaft of the 
left tibia, showing (a) the groove behind the cnemial crest in which 
the fibula was carried. 
9. Probably the metacarpal bone of the fifth digit, superior aspect, left 
foot. 
10. Phalange, probably of the fore limb. 
11. Lateral view of proximal end of a dorsal rib, showing the compressed 
vertical condition of the bone and its flattened superior surface. 
These characters are also shown in fig. 15, which gives the outline of 
the fractured end of the bone. 
12. Transverse section of another dorsal rib, showing the expanded upper 
surface widened as though to carry dermal armour. 
14. Right lateral aspect of neural arch of dorsal vertebra, showing (a) the 
fractured base of the transverse platform, (>) the lower articular 
surface for the dorsal rib, (¢) postzygapophysis, (@) fractured pre- 
zygapophysis, (¢) fractured base of neural spine, (f) articular surtace 
for union with the centrum. 
