Online Encyclopedia

Search over 40,000 articles from the original, classic Encyclopedia Britannica, 11th Edition.

SUBCLASS 2

Online Encyclopedia
Originally appearing in Volume V05, Page 674 of the 1911 Encyclopedia Britannica.
» Make a correction to this article.
» Add information or comments to this article.
Spread the word: del.icio.us del.icio.us it!

SUBCLASS 2 , NoTosTIGMA.—Chilopods with a See also:

series of median it bearing first pair of legs (d). Tip of palpognath. Antenna. Toxicognath. Last pair of append-ages, enlarged and directed back-wards. c, f. g, A D After See also:Pocock. Q.J.M.S. vol. 45, pl. 23, 1902. A, Anterior end of Craterostigmus f rom above. a, Basal segments of antennae. c, Cephalic See also:plate with eyes (o).

t.tox, Tergal plate of somite bearing toxicognaths (tox). t.lg.r, Tergal plate of somite bearing legs of first pair. B, Maxillae. C, Palpognath. D, Toxicognath. E, Last segment with genital See also:

capsule(g.c),and basal segments of legs of 14th and 15th pairs (lg. 14, lg. 15). married See also:Joseph See also:Centlivre, See also:chief See also:cook to See also:Queen See also:Anne, *hp survived her. Her first See also:play was a tragedy, The Perjured See also:Husband (1700), and she herself appeared for the first See also:time at See also:Bath in her See also:comedy Love at a Venture (1706). Among her most successful comedies are—The Gamester (1705); The Busy See also:Body (17o9).; A Bold Stroke for a Wife (1718); The See also:Basset-table (1706); and The Wonder! a Woman keeps a See also:Secret (1714), See also:ill which, as the jealous husband, See also:Garrick found one of his best parts. Her plots, verging on the farcical, were always ingenious and amusing, though coarse after the See also:fashion of the time, and the See also:dialogue fluent.

She never seems to have acted in See also:

London, but she was a friend of Rowe, See also:Farquhar and See also:Steele. Mrs Centlivre died on the 1st of See also:December 1723. Her dramatic See also:works were published, dorsal tracheal sacs furnished with tubes dipping into the pericardial See also:blood space, and opening each by an unpaired spiracle upon the 1st, 3rd, 5th, 8th, loth, See also:lath and 14th See also:leg- B Fro. 9.—A, Scutigera rubrolineata (after See also:Buffon). B, Tergum and See also:part of a second of the same enlarged to show the position of the stigmata o, o; p, hinder margin of tergum. bearing somites. This characteristic is accompanied by the See also:complete disappearance of the tergum of the 7th, either by See also:fusion with that of the 8th or by excalation, and by the evanescence of the terga of the 2nd, 4th, 6th, gth, nth and 13th pedigerous somites. The preantennal See also:area of the See also:head is not strongly reflexed inferiorly, and the eyes are large and See also:compound. The maxillae are See also:long and have a sensory See also:organ; the palpognaths are long, spiny and composed of five segments, like the See also:primitive Chilopod leg, and the toxicognaths have their basal segments disunited and independently movable. Gonopods duplicated in the male. This subclass contains the single See also:order Scutigeromorpha and the See also:family Scutigeridae. As in the Lithobiomorpha there are fifteen pairs of legs, the gonopods are well See also:developed in both sexes and the See also:young is hatched with only seven pairs of legs.

The legs and antennae in the adult are extremely long and many pointed. In habits as well as in structure the Scutigeridae, of which Scutigera is the best-known genus, differ greatly from other centipedes. Although they hide under stones and logs of See also:

wood like Lithobius, they are not lucifugous but diurnal, and may be seen See also:chasing their foes in the blazing See also:sun. They run with astonishing See also:speed and have the See also:power of dropping their legs when seized. See also:South of about the 40th parallel of See also:north See also:latitude they are universally distributed in suit-able localities. In most See also:species the body only reaches a length of about I in.; but twice that See also:size or more is reached by examples of the See also:Indian species Scutigera longicornis. Some fossils of Carboniferous See also:age have been described as Chilopoda by Scudder, who refers them to two families, Gerascutigeridae and Eoscolopendridae. But until the specimens have been examined by zoologists the genera they are alleged to represent cannot be taken seriously into See also:consideration. Remains of centipedes closely related to existing forms have been recorded from Oligocene beds. (R. I.

End of Article: SUBCLASS 2

Additional information and Comments

There are no comments yet for this article.
» Add information or comments to this article.
Please link directly to this article:
Highlight the code below, right click, and select "copy." Then paste it into your website, email, or other HTML.
Site content, images, and layout Copyright © 2006 - Net Industries, worldwide.
Do not copy, download, transfer, or otherwise replicate the site content in whole or in part.

Links to articles and home page are always encouraged.

[back]
SUAREZ, FRANCISCO (1548-1617) 		[next]
SUBCLASS I

Site © 2006 - Net Industries