Tabulate Corals; of the Lower Silurian; of the Upper Silurian;
  of the Devonian; of the Carboniferous; of the Permian.
Talpa Europoea. Tapiridoe.  Tapirs. Tapirus Arvernensis. Taxocrinus tuberculatus. Taxodium. Teleosaurus.  Teleostean Fishes; of the Cretaceous. Telerpeton Elginense. Tellina proxima. Tentaculites; ornatus. Terebra. Terebratella; Astleriana. Terebratula; digona; elongata; hastata; quadrifida;
  sphoeroidalis.
Terebratulina; caput-serpentis; striata.  Termites.  Terrapins.  Tertiary period.  Tertiary rocks, classification of. Testudinidoe.  Tetrabranchiate Cephalopods; of the Cambrian; of the Lower
  Silurian; of the Upper Silurian; of the Devonian; of the
  Carboniferous; of the Permian; of the Trias; of the Jurassic;
  of the Cretaceous; of the Eocene; of the Miocene.
Textularia; Meyeriana.  Thanet Sands. Theca. Theca Davidii. Thecidium.  Thecodont Reptiles. Thecodontosaurus; antiquus. Thecosmilia annularis. Thelodus.  Theriodont Reptiles. Thylacoleo.  Tile-stones. Titanotherium.  Toothed Birds.  Tortoises. Tragoceras.  Travertine.  Tree-Ferns, of the Devonian; of the Coal-measures.  Tremadoc Slates. Trematis.  Trenton Limestone. Trianthrus Beckii.  Triassic period; rocks of, in Britain; in Germany; in the
  Austrian Alps; in North America; life of.
Triconodon. Trigonia. Trigoniadoe. Trigonocarpum; ovatum.  Trilobites; of the Cambrian; of the Lower Silurian; of the
  Upper Silurian; of the Devonian; of the Carboniferous.
Trimerellidoe. Trinucleus; concentricus. Trionycidoe. Triton. Trochocyathus. Trochonema. Trogontherium; Cuvieri.  Trumpet-shells.  Tulip-tree. Turbinolia sulcata. Turbinolidoe. Turrilites; catenulatus. Turritella.  Turtles. Typhis tubifer.

Ullmania selaginoides. 
Unconformability of strata. 
Under-clay of coal.
Ungulata, of the Eocene; of the Miocene; of the
  Pliocene; of the Post-Pliocene. 
Uniformity, doctrine of.
Unio. 
Univalves (see Gasteropoda). 
Upper Cambrian; Chalk; Cretaceous; Devonian; Eocene; Greensand;
  Helderberg; Laurentian; Llandovery; Ludlow rock; Miocene;
  Oolites; Silurian period; rocks of, in Britain; in North
  America; life of.
Ursus arctos; Arvernensis; ferox; speloea.
Ursus.

Valley-gravels, high-level and low-level.
Vanessa Pluto.
Varanidoe. 
Vegetation (see Plants).
Ventriculites; simplex. 
Venus’s Flower-basket.
Vermilia.
Vespertilio Parisiensis. 
Vicksburg Beds. 
Vines. 
Vitreous Sponges.
Voltzia; heterophylla.
Voluta; elongata. 
Volutes.