RETEPORA (Lat. _rete_, a net; _porus_, a pore). A genus of
Lace-corals (_Polyzoa_).
RHAMPHORHYNCHUS (Gr. _rhamphos_, beak; _rhugchos_, nose). A genus
of Pterosaurian Reptiles.
RHINOCEROS (Gr. _rhis_, the nose; _keras_, horn). A genus of Hoofed
Quadrupeds.
RHIZOPODA (Gr. _rhiza_, a root; and _pous_, foot). The division
of _Protozoa_ comprising all those which are capable of emitting
pseudopodia.
RHYNCHOLITES (Gr. _rhugchos_, beak; and _lithos_, stone). Beak-shaped
fossils consisting of the mandibles of _Cephalopoda_.
RHYNCHONELLA (Gr. _rhugchos_, nose or beak). A genus of Brachiopods.
RODENTIA (Lat. _rodo_, I gnaw). An order of the Mammals; often
called _Glires_ (Lat. _glis_, a dormouse).
ROTALIA (Lat. _rota_, a wheel). A genus of _Foraminifera_.
RUGOSA (Lat. _rugosus_, wrinkled). An order of Corals.
RUMINANTIA (Lat. _ruminor_, I chew the cud). The group of Hoofed
Quadrupeds (_Ungulata_) which "ruminate" or chew the cud.
SARCODE (Gr. _sarx_, flesh; _eidos_, form). The jelly-like substance
of which the bodies of the _Protozoa_ are composed. It is an
albuminous body containing oil-granules, and is sometimes called
"animal protoplasm."
SAURIA (Gr. _saura_, a lizard). Any lizard-like Reptile is often
spoken of as a "Saurian;" but the term is sometimes restricted
to the Crocodiles alone, or to the Crocodiles and Lacertilians.
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