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

by Sir Charles Lyell

Terebellum fusiforme.

Fig. 182.

Aturia zigzag. Bronn. Syn. Nautilus zigzag. Sow. London clay. Sheppey.

Fig. 183.

Belosepia sepiodea, De Blainv. London clay. Sheppey.

The above shells are accompanied by a sword-fish (Tetrapterus priscus, Agassiz), about 8 feet long, and a saw-fish (Pristis bisulcatus, Ag.), about 10 feet in length; genera now foreign to the British seas. On the whole, no less than 50 species of fish have been described by M. Agassiz from these beds in Sheppey, and they indicate, in his opinion, a warm climate.