A Manual of Elementary Geology / or, The Ancient Changes of the Earth and its Inhabitants as Illustrated by Geological Monuments

by Sir Charles Lyell

• a. grinding surface.
• b. side view; two-thirds of nat. size.

Fig. 137.

c. d. Ox.

Ox, common, from shell marl, Forfarshire; true molar upper jaw; two-thirds nat. size.

• c. grinding surface.
• d. side view.

Fig. 138.