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Nummulites :: Nummulites (n.) A genus of extinct Tertiary Foraminifera, having a thin, flat, round shell, containing a large number of small chambers arranged spirally..

Lagenian :: Lagenian (a.) Like, or pertaining to, Lagena, a genus of Foraminifera having a straight, chambered shell..

Nodosarine :: Nodosarine (a.) Resembling in form or structure a foraminiferous shell of the genus Nodosaria.

Miliola :: Miliola (n.) A genus of Foraminifera, having a porcelanous shell with several longitudinal chambers..

Polythalamous :: Polythalamous (a.) Many-chambered; -- applied to shells of Foraminifera and cephalopods. See Illust. of Nautilus.

Rotalite :: Rotalite (n.) Any fossil foraminifer of the genus Rotalia, abundant in the chalk formation. See Illust. under Rhizopod..

Orbulina :: Orbulina (n.) A genus of minute living Foraminifera having a globular shell.

Foraminiferous :: Foraminiferous (a.) Having small openings, or foramina..

Foraminifer :: Foraminifer (n.) One of the foraminifera.

Reticularia :: Reticularia (n. pl.) An extensive division of rhizopods in which the pseudopodia are more or less slender and coalesce at certain points, forming irregular meshes. It includes the shelled Foraminifera, together with some groups which lack a true shell..

Porcellaneous :: Porcellaneous (a.) Having a smooth, compact shell without pores; -- said of certain Foraminifera..

Imperforata :: Imperforata (n. pl.) A division of Foraminifera, including those in which the shell is not porous..

Polythalamia :: Polythalamia (n. pl.) A division of Foraminifera including those having a manychambered shell.

Monothalama :: Monothalama (n. pl.) A division of Foraminifera including those that have only one chamber.

Orbitolites :: Orbitolites (n.) A genus of living Foraminifera, forming broad, thin, circular disks, containing numerous small chambers..

Eozoon :: Eozoon (n.) A peculiar structure found in the Archaean limestones of Canada and other regions. By some geologists it is believed to be a species of gigantic Foraminifera, but others consider it a concretion, without organic structure..

Rhizopoda :: Rhizopoda (n. pl.) An extensive class of Protozoa, including those which have pseudopodia, by means of which they move about and take their food. The principal groups are Lobosa (or Am/bea), Helizoa, Radiolaria, and Foraminifera (or Reticularia). See Protozoa..

Parkeria :: Parkeria (n.) A genus of large arenaceous fossil Foraminifera found in the Cretaceous rocks. The species are globular, or nearly so, and are of all sizes up to that of a tennis ball..

Perforata :: Perforata (n. pl.) A division of Foraminifera, including those having perforated shells..

Foraminiferous :: Foraminiferous (a.) Pertaining to, or composed of, Foraminifera; as, foraminiferous mud..

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