n; of the Carboniferous; of the Permian;
of the Trias; of the Jurassic; of the Cretaceous.
_Spongilla_.
_Spongillopsis_.
_Spongophyllum_.
Spore-eases, of Cryptogams in the Ludlow rocks; in the Coal.
Squirrels.
_Stagonolepis_.
Staircase-shell.
Stalactite.
Stalagmite.
Star-corals.
Star-fishes.
St Cassian Beds.
_Stephanophyllia_.
_Stereognathus_.
_Stigmaria; ficoides_.
Stonesfield Slate; Mammals of.
Strata, contemporaneity of.
Stratified rock.
_Streptelasma_.
_Streptorhynchus_.
_Stromatopora; rugosa; tuberculata_.
_Strombodes; pentagonus_.
_Strombus_.
_Strophalosia_.
_Strophodus_.
_Strophomena; alternata; deltoidea; filitexta; rhomboidalis;
Subplana_.
Sub-Apennine Beds.
Sub-Carboniferous rocks.
Succession of life upon the globe.
_Suida_.
Sulphate of lime.
_Sus Erymanthius; scrofa_.
_Synastroea_.
_Synhelia Sharpeana_.
_Synocladia; virgulacea_.
_Syringopora; ramulosa_.

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_.