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TURBINATED (Lat. _turbo_, a top). Top-shaped; conical with a round
base.
TURRILITES (Lat, _turris_, a tower). A genus of the _Ammonitidoe_.
UMBO (Lat. the boss of a shield). The beak of a bivalve shell.
UNGUICULATE (Lat. _unguis_, nail). Furnished with claws.
UNGULATA (Lat. _ungula_, hoof). The order of Mammals comprising
the Hoofed Quadrupeds.
UNGULATE. Furnished with expanded nails constituting hoofs.
UNILOCULAR (Lat. _unus_, one; and _loculus_. a little purse).
Possessing a single cavity or chamber. Applied to the shells
of _Foraminifera_ and _Mollusca_.
UNIVALVE (Lat. _unus_, one; _valvoe_, folding-doors). A shell
composed of a single piece or valve.
URODELA (Gr. _oura_, tail; _delos_, visible). The order of the
Tailed Amphibians (Newts, &c.)
VENTRAL (Lat. _venter_, the stomach). Relating to the inferior
surface of the body.
VENTRICULITES (Lat. _ventriculum_, a little stomach). A genus
of siliceous Sponges.
VERMIFORM (Lat. _vermis_, worm; and _forma_, form). Worm-like.
VERTEBRA (Lat. _verto_, I turn). One of the bony segments of the
vertebral column or backbone.
VERTEBRATA (Lat. _vertebra_, a bone of the back, from _vertere_,
to turn). The division of the Animal Kingdom roughly characterised
by the possession of a backbone.
VESICLE (Lat. _vesica_, a bladder). A little sac or cyst.
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