3_b_.--Tooth of the _Labyrinthodon Jægeri_, from the New Red sandstone near Wirtemberg; half the natural size: the specimen presented by Dr. Jæger. See p. 742. 3_a_.--A moiety of a transverse polished section, × 20. 3_b_.--Portion of a vertical section near the apex, × 20. 3_c_.--One of the anfractuosities of fig. 3_a_ × ×. 4_a_.--Crown or upper portion of a tooth of a young _Iguanodon_, from Tilgate Forest. See p. 697. 4_b_.--Portion of a vertical section of the above, × 20. 4_c_.--A small portion of a transverse section of the same, × 20. 5.--Tooth of _Goniopholis_, Tilgate Forest: half the natural size. See p. 678. 6_a_.--Tooth of a reptile (probably of the _Hylæosaurus_), from Tilgate Forest; half the natural size. See p. 690. 6_b_.--Portion of a vertical section of the same, × 20. 7_a_.--Tooth of _Megalosaurus_, from Tilgate Forest. See p. 687. 7_b_.--Portion of a vertical section of the same, × 10. 8.--A small portion of a vertical section of a tooth of _Dendrodus_. See p. 618. 9.--Portion of a transverse section of the base of a tooth of _Ichthyosaurus_, × 20. See p. 665. 10_a_.--Tooth of _Lepidotus_, Tilgate Forest. See p. 606. 10_b_.--The upper figure is a transverse section, and the lower a vertical section of the same, × 20. LIST OF LIGNOGRAPHS IN VOL. I. ============ (_Illustrative of Fossil Botany._) LIGN. PAGE