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VORTICELLA

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Originally appearing in Volume V28, Page 213 of the 1911 Encyclopedia Britannica.

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VORTICELLA , the See also:

Bell-Animalcule, a genus of Peritiichous See also:

INFUSORIA

Infusoria (q.v.) characterized by the bell-shaped See also:

BODY

body, with See also:

SHORT, FRANCIS JOB (1857– )

short oral disk and See also:

COLLAR

collar, attached by a hollow stalk, inside and around which passes, attached spirally, a contractile bundle of See also:

MYONEMES

myonemes. By their contraction the stalk is brought into the See also:

FORM (Lat. forma)

form of a corkscrew, the See also:

THREAD (0. Eng. praed, literally, that which is twisted, prawan, to twist, to throw, cf. " throwster," a silk-winder, Ger. drehen, to twist, turn, Du. draad, Ger. Draht, thread, wire)

thread being now on the shorter, i.e. the inner, See also:

side of the turns; and the See also:

animal is jerked back near to the See also:

BASE

base of the stalk. As soon as the contraction of the thread ceases, the See also:

ELASTICITY

elasticity of the stalk ex-tends the animal to its previous position. On fission, one of the two animals swims off by the development of the temporary posterior See also:

GIRDLE (O. Eng. gyrdel, from gyrdan, to gird; cf. Ger. Gurtel, Dutch gordel, from giirten and gorden; "gird" and its doublet " girth " together with the other Teutonic cognates have been referred by some to the root ghar—to seize, enclose, seen in Gr. )(s

girdle of membranelles, the disk being retracted and closed over by the collar, so that the See also:

CELL (from Lat. cella, probably from an Indo-European kal —seen in Lat. celare, to hide; another suggestion connects the word with Lat. cera, wax, taking the original meaning to refer to the honeycomb)

cell is ovoid: on its See also:

ATTACHMENT

attachment the posterior girdle of See also:

CILIA (plural of Lat. cilium, eyelash)

cilia disappears and a stalk forms. The other cell remains attached to the old stalk. In the allied genera Carchesium and Zoothamnium the two produced by fission remain See also:

UNITED

united, so that a branching See also:

COLONY (Lat. colonia, from colonus, a cultivator)

colony is ultimately produced. The genus is a large one, and many See also:

SPECIES

species are epizoic on various See also:

WATER

water animals.

End of Article: VORTICELLA

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