Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural history) ..By Richard Lydekker .. . St. Petersbourg,vol. xxxi. art. G, pi. xii., as Thaumatosaurus l>y A. N. Leeds, Esq., 1888. R. 1279 a. Cast of the crown and upper part of the root of a muchlarger tooth. The original was obtained from the Oxford 1 Bull. Soc. Geol. France, ser. 3, vol. i. p. 378 (1873).—Liopleurodon. 2 Loc. cit. 3 Bull. Soc. Geol. France, ser, 3, vol. viii. p. 544 (1880). 4 Index to Aves &c. in Cambridge Museum, p. 118 (18(59).—Undescribed. 5 Mem. Ac. Imp. St. Petersbourg, vo
Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural history) ..By Richard Lydekker .. . St. Petersbourg,vol. xxxi. art. G, pi. xii., as Thaumatosaurus l>y A. N. Leeds, Esq., 1888. R. 1279 a. Cast of the crown and upper part of the root of a muchlarger tooth. The original was obtained from the Oxford 1 Bull. Soc. Geol. France, ser. 3, vol. i. p. 378 (1873).—Liopleurodon. 2 Loc. cit. 3 Bull. Soc. Geol. France, ser, 3, vol. viii. p. 544 (1880). 4 Index to Aves &c. in Cambridge Museum, p. 118 (18(59).—Undescribed. 5 Mem. Ac. Imp. St. Petersbourg, vol. xxxi. art. 6, p. 27 (1883).PART II. L 146 SAUEOPTERYGIA. Clay near Peterborough, and is in the Collection of A. , Esq. On the concave side of the crown there arevery few ridges. The height of the crown, is 0,100(3*9 inches), and the greatest transverse diameter 0,063(2*1 inches). Made in the Museum, 1888. 39787. The imperfect crown of a tooth very similar to No. R. 1279 ;from the Oxford Clay of Weymouth, Dorsetshire. Thesummit of the crown is wanting, but a distinct intercarinal Fig. Pliosaurus ferox.—Part of the lateral surface of the crown of a tooth ;from the Oxford Clay of Weymouth, j. space can be seen on the concave surface. The ridges onthe lateral (fig. 45) and concave surfaces are placed furtherapart than in the preceding specimen. This example alsoaccords with the teeth figured by KiprijanofF. Purchased. 32648. A small posterior tooth; from the Oxford Clay of Vaches-Noires (Calvados), France. In this specimen the ridgescontinue quite round the crown. It is indistinguishablefrom the two teeth figured by Kiprijanof, op. cit. pi. 1. Tesson Collection. Purchased, 1857. 24683. The crown of a smaller tooth of similar type; from theOxford Clay of Christian Malford, Wiltshire. Purchased, 1850. 46008. The imperfect crown of a very large tooth; probably fromthe Oxford Clay of Dorsetshire. The diameter of thefractured basal extremity is 0,051, and
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