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Explan ATION OF PLATE 22. 33

39–43. Ph. digiti annularis. 44–47. Ph. digiti auricularis.

48. Femur.

49. Tibia.

50. Fibula."

51. Tarsus. 52–56. Metatarsus. 57, 58. Phalanges digiti primi. 59–61. Ph.d. secundi. 62–65. Ph. d. tertii. 66–70. Ph.d. quarti. 71–74. Ph. d. quinti. 6 Impressions of the membrane of the wing.”

PLATE 22. V. I. p. 171.

A. Restoration of the Skeleton of Pterodactylus crassi-
rostris. (Goldfuss.)
B. Fore foot of a Lizard. (Cuvier.)
C. Restoration of the right fore foot, or right hand of
Pterodactylus crassirostris. (Goldfuss.)
D. The right fore foot, or hand of P. longirostris. (Cu-
vier and Soemmerring.)
E. The Fore foot of P. macronyx. (Buckland, Geol.
Trans. Lond. 2d. Ser. Vol. 3. Pl. 27.)
F. The hind foot of a Lizard. (Cuvier, Oss. Foss. Vol.
V. Pt. II. Pl. XVII.)
G. Right foot of P. crassirostris, as conjecturally restored

* Professor Agassiz considers that the Corrugations on the surface of the Stone (3), which Dr. Goldfuss supposed to be the impressions of Hairs, or Feathers, are only casts of the minute foldings of the contracted membrane of the wing. It is probable that Pterodactyles had a naked skin like the Ichthyosaurus; (See Pl. 10. A.) because the weight of scales would have encumbered their movements in the alr.

by Dr. Goldfuss. No authority for this seems to be afforded by the fossil specimen N. H. Right foot P. longirostris. (Cuvier.) I. Foot of P. macronyx. (Buckland.) K. Hind foot of a Bat. L. Skeleton of Draco volans. (Carus. Comp. Anat. P. 370.) showing the elongated bones, or false ribs, which support the membranous expansion of its Parachute. M. Skeleton of a Bat. (Cheselden.) N. Skeleton of P. crassirostris, in the Museum at Bonn, in Solenhofen slate. (Goldfuss.) O. Skeleton of P. brevirostris, from near Aichstadt, in the same slate. (Goldfuss.) P. Imaginary restoration of Pterodactyles, with a cotemporary Libellula, and Cycadites.

Plate 23. V. I. p. 180.

Fig. 1'. Anterior extremity of the right jaw of Megalosaurus, from the Stonesfield slate, Oxon. (Buckland.) Fig. 2'. Outside view of the same, exhibiting near the extremity, large perforations of the bone for the passage of vessels. (Buckland.) Fig. 1. Tooth of Megalosaurus, incomplete towards the root, and seen laterally as in Fig. 1'. Nat, size. (Buckland.) Fig. 2. Side view of a tooth nearly arrived at maturity. The dotted lines mark the compressed conical cavity, containing Pulp, within the Root of the growing tooth. Scale two thirds. (Buckland.) Fig. 3. Tranverse section of Fig. 1'. showing the thickness of the largest tooth (a.) and its root set deep and firmly in the bony socket, which descends Fig.

ExPLANATION OF PLATES 24. 25. 35'

nearly to the bottom of the Jaw. Scales two thirds.
(Buckland.)
4. Transverse section of the tooth (Fig. 2.) showing
the manner in which the back and sides are en-
larged, and rounded in order to give strength, and
the front brought to a strong and thin cutting edge
at D'. (Buckland.)

PLATE 24. V. I. p. 184.

Fossil Teeth and bony nasal horn of Iguanodon; and lower Jaw and Teeth of Iguana. (Mantell and Original)

In Mr. Mantell's collection there is a perfect thigh bone of this animal, 3 feet 8 inches long, and 35 inches in circumserence at its largest and lower extremity.

PLATE 25. V. I. p. 191.

Fig. 1. Fossil Crocodilean found at Saltwick near

Fig.

Fig.

Fig.

Whitby, eighteen feet long, and preserved in the
Museum of that town. This figure is copied from
Plate XVI. of Bird and Young's Geol. Survey of
the Yorkshire coast. As this appears to be the
same species with that engraved in the Phil. Trans.
1758, Vol. 50. Pt. 2. Tab. 22, and Tab. 30, and
presented to the Royal Society by Captain Chap-
man, Mr. König has applied to it the name of Teleo-
saurus Chapmanni.
2. Another head of Teleosaurus Chapmanni, also in
the Museum at Whitby, and from the Lias of that
neighbourhood. (Original.)
3. Head of a third Individual of the same species
from the same locality, placed in 1834, in the British
Museum, showing the outside of the lower Jaw.
(Young and Bird.) -
4. View of the inside of a lower Jaw of the same

Fig.

species, in the Oxford Museum, from the Great Oolite, at Enslow, near Woodstock, Oxon. (Ori

ginal.)
PLATE 25. V. I. p. 192.

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.

Fig.

Fig.

2. Extremity of the upper and lower Jaw of Teleo-
saurus in the Oxford Museum, from the Great
Oolite at Stonesfield, Oxon. See V. I. p. 193. (Ori-
ginal.)
8. Anterior extremity of the upper Jaw of Steneo-
saurus, 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.)
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.)

Fig.

PLATE 26'. V. I. p. 201.

1. Impressions of footsteps of several unknown ani-
mals 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

ExPLANATION OF PLATES 26". 26". 37

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. l. 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. Fig. 2. One of the impressions of the the hind feet of Chirotherium, on the slab Fig. 1; half nat. size. (Sickler.) Fig. 3. One of the footsteps in the track of the smaller animal, upon this slab; nat. size. (Sickler.) M. Link has made out the footsteps of four species of animals in the Hildburghausen sandstone, and it has been conjectured that some of these have been derived from gigantic Batrachians.

PLATE 26". V. I. p. 203.

Impression of the hind foot of Chirotherium, selected from a well-preserved Track upon a slab of sandstone from Hildburghausen, in the British Museum. (Original.)

Plate 26". V. I. p. 203.

Footsteps of a small web-footed animal, probably crocodilean, drawn from a Cast of impressions on Sandstone, found near Hildburghausen. (Original.) The Sandstones in which all these fossil footsteps have been discovered in Germany and Scotland, appear to be referable to the same division of the secondary strata, WOL. II. 4

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