TEXTULARIA. (Lat. _textilis_, woven). A genus of _Foraminifera_.
THECA (Gr. _theke_, a sheath). A genus of Pteropods.
THECODONTOSAURUS (Gr. _theke_, a sheath; _odous_, tooth; _saura_,
lizard). A genus of "Thecodont" Reptiles, so named in allusion
to the fact that the teeth are sunk in distinct sockets.
THERIODONT (Gr. _therion_, a beast; _odous_, tooth). A group of
Reptiles so named by Owen in allusion to the Mammalian character
of their teeth.
THORAX (Gr. a breastplate). The region of the chest.
THYLACOLEO (Gr. _thulakos_, a pouch; _leo_, a lion). An extinct
genus of Marsupials.
TRIGONIA (Gr. _treis_, three; _gonia_, angle). A genus of Bivalve
Molluscs.
TRIGONOCARPON (Gr. _treis_, three; _gonia_. angle; _karpos_,
fruit). A genus founded on fossil fruits of a three-angled form.
TRILOBITA (Gr. _treis_, three; _lobos_, a lobe). An extinct order
of _Crustaceans_.
TRINUCLEUS (Lat. _tris_, three; _nucleus_, a kernel). A genus
of Trilobites.
TROGONTHERIUM (Gr. _trogo_, I gnaw; _therion_, beast). An extinct
genus of Beavers.
TUBICOLA (Lat. _tuba_, a tube; and _colo_, I inhabit). The order
of _Annelida_ which construct a tubular case in which they protect
themselves.
TUBICOLOUS. Inhabiting a tube.
TUNICATA (Lat. _tunica_, a cloak). A class of _Molluscoida_ which
are enveloped in a tough leathery case or "test.
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