SAUROPTERYGIA (Gr. _sauro_; _pterux_, wing). An extinct order
of Reptiles, called by Huxley _Plesiosauria_, from the typical
genus _Plesiosaurus_.
SAURURAE (Gr. _saura_; _oura_, tail). The extinct order of Birds
comprising only the _Archoeopteryx_.
SCANSORES (Lat. _scando_, I climb). The order of the Climbing
Birds (Parrots, Woodpeckers, &c.)
SCAPHITES (Lat. _scapha_, a boat). A genus of the _Ammonitidoe_.
SCOLITHUS (Gr. _skolex_, a worm; _lithos_, a stone). The vertical
burrows of sea-worms in rocks.
SCUTA (Lat. _scutum_, a shield). Applied to any shield-like plates;
especially to those which are developed in the integument of
many Reptiles.
SELACHIA or SELACHII (Gr. _selachos_, a cartilaginous fish, probably
a shark). The sub-order of _Elasmobranchii_ comprising the Sharks
and Dog-fishes.
SEPIOSTAIRE. The internal shell of the Sepia, commonly known as
the "cuttle-bone."
SEPTA. Partitions.
SERPENTIFORM. Resembling a serpent in shape.
SERTULARIDA (Lat. _sertum_, a wreath). An order of _Hydrozoa_.
SESSILE (Lat. _sedo_, I sit). Not supported upon a stalk or peduncle;
attached by a base.
SETHAE (Lat. bristles). Bristles or long stiff hairs.
SIGILLARIOIDS (Lat. _sigilla_, little images). A group of extinct
plants of which _Sigillaria_ is the type, so called from the
seal-like markings on the bark.
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