PLATE 71.

(All the figures in this plate are represented rather less than one-half

their natural size.)

Fig. 1. Ventral view of sacrum and ancliylosed lumbar vertebrae. The numerals 1-5,

s., mark the sacral, and the letters LI. I. the lumbar vertebrae. ng. Nerve-groove.

• i Quarterly Journal Geological Society,' yol. xxx., 1874, plate xxxi., figs. 1, 2.

f In all the representations of vertebrae, c. Centrum, ns. Neural spinous process, prs. Prsezyga- pophysis. psz. Postzygapophysis, cl. Diapophysis. p. Parapophysis. c.c. Capitulurn costal r. Bib-

Fig. 2. Cross sectional outline at fracture through the third sacral vertebra.

Fig. 3. Dorsal view of fragment of the large scutal shield resting on the fourth and

fifth sacral vertebras. Fig. 4. Lateral view of a large dermal spine. Fig. 5. Basal view of the same. Fig. 6. Edge view of the same. Fig. 7. Keeled scute with angularly excavated base.