_Sabal major_.
Sabre-toothed Tiger.
_Saccammina_.
_Saccosoma.
Salamanders.
Salina Group.
_Salix; Meeki_.
_Salmonidoe_.
_Sao hirsuta_.
_Sassafras cretacea_.
_Sauropterygia_.
_Scalaria; Groenlandica_.
_Scaphites; oequalis_.
_Schizodus_.
Schoharie Grit.
_Scolecoderma_.
_Scoliostoma_.
_Scolithus; Canadensis_.
Scorpions of the Coal-measures.
Scorpion-shells.
Screw-pines.
_Scutella; subrotunda_.
Sea-cows (_see_ Sirenia).
Sea-lilies (_see_ Crinoidea).
Sea-lizards (_see_ Enaliosaurians).
Seals.
Sea-mats and Sea-mosses (_see_ Polyzoa).
Sea-shrubs (_see_ Gorgonidae).
Sea-urchins (_see_ Echinoidea).
Sea-weeds.
Secondary period.
Sedimentary rocks.
_Semnopithecus_.
Septaria.
_Sequoia; Couttsioe; gigantea; Langsdorffii_.
_Serolis_.
Serpents (_see_ Ophidia).
_Serpulites_.
Sewalik Hills (_see_ Siwalik Hills).
Sheep.
Shell-sands.
_Sigillaria; Groeseri_.
Sigillarioids.
Silicates, infiltration of the shells of Foraminifera by.
Siliceous rocks.
Siliceous Sponges.
Silicification.
Silurian period (_see_ Lower Silurian and Upper Silurian).
_Simosaurus; Gaillardoti_.
_Siphonia; ficus_.
Siphonostomatous Univalves.
_Siphonotreta_.
_Sirenia_; of the Eocene; of the Miocene.
_Siren lacertina_.
_Sivatherium; giganteum_.
Siwalik Hills, Miocene strata of.
Skiddaw Slates.
Sloths.
_Smilax_.
_Smithia_.
Snakes (_see_ Ophidia).
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