Geology and Mineralogy considered with reference to Natural Theology/Plate 25'

From Wikisource
Jump to navigation Jump to search
Geology and Mineralogy considered with reference to Natural Theology, plate 25'.png

Plate 25'. V. I. p. 192.

Fig. 1. Head of a Crocodile found in 1831, by E. Spencer, Esq. in the London Clay, of the Isle of Sheppy. See V. I. p. 192. (Original.)
Fig. 2. Extremity of the upper and lower Jaw of Teleosaurus in the Oxford Museum, from the Great Oolite at Stonesfield, Oxon. See V. I. p. 193. (Original.)
Fig. 3. Anterior extremity of the upper Jaw of Steneosaurus, in the Museum of Geneva, from Havre; the same species occurs in the Kimmeridge Clay of Shotover hill, near Oxford. See V. I. p. 192. (De la Beche.)
Fig. 4. Fossil Turtle, from the slate of Glaris. See V. I. p. 196. (Cuvier.)

Plate 26. V. I. p. 198.

Fossil Footsteps indicating the Tracks of ancient animals, probably Tortoises, on the New Red Sandstone near Dumfries. (From a cast presented by Rev. Dr. Duncan.)

Plate 26'. V. I. p. 201.

Fig. 1. Impressions of footsteps of several unknown animals upon a slab of New Red Sandstone found at the depth of eighteen feet in a quarry at Hessberg, near Hildburghausen in Saxony. (Sickler.)
The larger footsteps a. b. c. are referred to an animal named provisionally, Chirotherium. The fore feet of this animal were less by one half than the hind feet, and the tracks of all the feet are in the same straight line. The footsteps d. e. f. form part of another track of the same kind. Some of the large toes of the Chirotherium, and also of the smaller species, have left distinct impressions of nails: g. h. i. k. 1. m. n. o. p. q. form the track of an animal of another species, probably a Tortoise crossing the same slab in a different direction.
The irregular cylindrical concretions that intersect each other on the surface of this slab, appear to have been formed in cracks, caused by the contraction of a thin bed of green marl, interposed between two deposites of Sandstone. See note, V. I. p. 203.