_disjejunare_, to
break one's fast (_jejunium_); it is, therefore, the same word as Fr.
_dejeuner_, to breakfast, in modern France, to take the midday meal,
_diner_ being used for the later repast. The term "dinner-wagon,"
originally a movable table to hold dishes, is now used of a two-tier
sideboard.

DINOCRATES, a great and original Greek architect, of the age of
Alexander the Great. He tried to captivate the ambitious fancy of that
king with a design for carving Mount Athos into a gigantic seated
statue. This plan was not carried out, but Dinocrates designed for
Alexander the plan of the new city of Alexandria, and constructed the
vast funeral pyre of Hephaestion. Alexandria was, like Peiraeus and
Rhodes (see HIPPODAMUS), built on a regular plan; the streets of most
earlier towns being narrow and confused.

DINOFLAGELLATA, so called by O. Butschli (= the CILIOFLAGELLATA of E.
Claparide and H. Lachmann), a group of Protozoa, characterized as
Mastigophora, provided with two flagella, the one anterior extended in
locomotion, the other coiled round its base, or lying in a transverse
groove. The body is bounded by a firm pellicle, often supplemented by an
armour ("lorica") of cuticular cellulose plates, with usually a marked
longitudinal groove from which the anterior flagellum springs, and an
oblique or spiral transverse groove for the second flagellum. In
_Polykrikos_ (fig. 2, 9) there are eight transverse grooves each with
its flagellum. The armour-plates are often exquisitely sculptured, and
may be produced into spines or perpendicular plates to give greater
surface extension, as we find in other plankton organisms. The cortical
plasma may protrude pseudopodia in the longitudinal groove; it contains
trichocysts in several species, true nematocysts in _Polykrikos_. It
contains chromatophores in many species, coloured by a mixed lipochrome
pigment which appears to be distinct from diatomin. The endoplasm is
ramified between alveoli; it contains a large nucleus (in _Polykrikos_
there are eight nuclei, accompanied by smaller, more numerous bodies
regarded by O. Butschli as micro-nuclei). Besides the other spaces are
definite rounded or oval vacuoles with a permanent pellicular wall
termed by Schutt "pusules"; these open by a duct or ducts into the
longitudinal groove. They enlarge and diminish, and are possibly
excretory like the "contractile vacuoles" of other Protista; though it
has been suggested that by