DROMATHERIUM (Gr. _dromaios_, nimble; _therion_, beast). A genus
of Triassic Mammals.
DRYOPITHECUS (Gr. _drus_, an oak; _pithekos_, an ape). An extinct
genus of Monkeys.
ECHINODERMATA (Gr. _echinos_; and _derma_, skin). A class of
animals comprising the Sea-urchins, Star-fishes, and others, most
of which have spiny skins.
ECHINOIDEA (Gr. _echinos_; and _eidos_, form). An order of
_Echinodermata_, comprising the Sea-urchins.
EDENTATA (Lat. _e_, without; _dens_, tooth). An order of _Mammalia_
often called _Bruta_.
EDENTULOUS. Toothless, without any dental apparatus. Applied to
the mouth of any animal, or to the hinge of the Bivalve Molluscs.
ELASMOBRANCHII (Gr. _elasma_, a plate; _bragchia_, gill). An order
of Fishes, including the Sharks and Rays.
ENALIOSAURIA (Gr. _enalios_, marine; _saura_, lizard), Sometimes
employed as a common term to designate the extinct Reptilian
orders of the _Ichthyosauria_ and _Plesiosauria_.
EOCENE (Gr. _eos_, dawn; _kainos_, new or recent). The lowest
division of the Tertiary rocks, in which species of existing
shells are to a small extent represented.
EOPHYTON (Gr. _eos_, dawn; _phuton_, a plant). A genus of Cambrian
fossils, supposed to be of a vegetable nature.
EOZOOeN (Gr. _eos_, dawn; _zooen_, animal). A genus of chambered
calcareous organisms found in the Laurentian and Huronian formations.
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