[80]. A fossil bivalve, allied to the oyster, and very abundant in the secondary strata.

[81]. Belemnite, from belemnos, a dart, and so called from its arrow-headed shape.

[82]. Saurian, from sauros, a lizard, the name by which the great family of lizards is designated.

[83]. From ichthus, a fish, and sauros, a lizard; so called from its resemblance to both.

[84]. Heteroclite; heteros, another, and klitos, inclining; a word applied to any thing or person deviating from common forms.

[85]. Very unlike the alligator, whose eyes are placed at a considerable distance behind the nose.

[86]. From pleiōn, more, and sauros, a lizard; because it is more like a lizard than the Ichthyosaurus.

[87]. Mantel’s Fossils of the British Museum, p. 341.

[88]. This formation is sometimes called the Jurassic system.

[89]. Lyell’s Manual of Elementary Geology, p. 12, ed. 1852.