Fig. 10. Fossil tooth of a fish of the Shark family (_Notidanus microdon_, of Agassiz,) from the chalk of Kent. Fig. 11. Recent "tooth of one of the Dog-fish," (Mr. Parkinson,) for comparison with fig. 10. Fig. 12. Tooth of an extinct group of squaloid fishes (_Ptychodus decurrens_, of Agassiz,) from the chalk of Kent.[67] [Footnote 67: See Medals of Creation, vol. ii. p. 617.] Fig. 13. A ctenoid (or comb-like) scale of a fish, (probably of a species of _Beryx_,) from the chalk of Kent. [Illustration: Plate LXX.] PLATE LXX. Fossil Reptiles and Fishes. Fig. 1. A reduced figure of the celebrated specimen of the jaws, &c. of the "Fossil Animal of Maestricht," (_Mosasaurus Hoffmani_,) from the cretaceous strata of St. Peter's Mountain. See "_Supplementary Notes_," art. _Mosasaurus_. "_a, b._ The left side of the lower jaw, nearly whole, and seen on its outer side. _c, d._ Right side of the lower jaw, viewed on the inner side, the posterior part of which, a little concealed by the palate bones, is continued to _e_. _f, g._ The right side of the upper jaw, seen on its inner side, and with the palate bone. This part is nearly in its natural position in relation to the corresponding ramus of the lower jaw. _h, i._ A fragment of the left side of the upper jaw, displaced and fallen across the lower jaw. _k, l, m; k', l', m', o'._ The two palate bones displaced and thrown one over the other, and also over the right side of the lower jaw. In the original specimen a portion of bone is placed from _m_ to _p_, and another at _q_, which are omitted to render the figure more intelligible."--_Mr. Parkinson._ Figs. 2 to 18, are fossil teeth of various kinds of fishes, principally of the Shark and Ray families. Fig. 2. Tooth of a shark (_Lamna_), from Malta. Fig. 3. Tooth of a shark (_Galeus pristodontus_), chalk marl, Kent. Fig. 4. Tooth of a Saurian, the upper and lower end imperfect: probably of a species of Steneosaurus, from Bath. Figs. 5, & 8. Teeth of a shark (_Otodus_,) London Clay, Isle of Sheppey. Fig. 6. Tooth of a fish, (_Spherodus_,) from the Oolite, Gloucestershire. Fig. 7. Part of the fossil jaw with three rows of teeth of a fish, (of the Pycnoid[68] family,) from the Oolite, Gloucestershire. [Footnote 68: Medals of Creation, vol. ii. p. 641.] Fig. 9. Tooth of a species of _Lamna_, from Sheppey. Fig. 10. Tooth of a species of _Hybodus_,[69] Stonesfield. [Footnote 69: Ibid. p. 621.] Fig. 11. A very large tooth of a Shark, (_Carcharias megalodon_,) from the tertiary deposits of Malta. Fig. 12. Fragment of a bone, with two teeth, probably of a species of _Pycnodus_.