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

by Sir Charles Lyell

Fig. 343.

Palæoniscus elegans, Sedg. Under surface of scale magnified. Marl-slate.

Fig. 344.

Palæoniscus glaphyrus, Ag. Under surface of scale magnified. Marl-slate.

Fig. 345.