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WOOD GREEN

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Originally appearing in Volume V28, Page 802 of the 1911 Encyclopedia Britannica.
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WOOD See also:GREEN , an See also:urban See also:district in the See also:Tottenham See also:parliamentary See also:division of See also:Middlesex, See also:England, suburban to See also:London, 7 M. N. of St See also:Paul's See also:Cathedral, on the See also:Great See also:Northern railway. Pop. (1891) 25,831, (1901) 34,233. The name covers a populous residential district lying See also:north of See also:Hornsey and See also:west of Tottenham. To the west lies Muswell See also:Hill, with the grounds and See also:building of the Alexandra See also:Palace, an See also:establishment somewhat similar to the Crystal Palace. It was opened in 1873, destroyed by See also:fire almost immediately, and reopened in 1875. Muswell Hill II took name from a See also:holy well, of high repute for curative See also:powers, over which an See also:oratory was erected See also:early in the 12th See also:century, attached to the priory of St See also:John of See also:Jerusalem in See also:Clerkenwell. WOOD-See also:LOUSE, a name commonly applied to certain terrestrial See also:Crustacea of the See also:order Isopoda (see See also:MALACOSTRACA), which are found in See also:damp places, under stones or dead leaves, or among decaying wood. They See also:form the tribe Oniscoidea and are distinguished from all other Isopoda by their See also:habit of living on See also:land and breathing See also:air, and by a number of structural characters, such as the small See also:size of the antennules and the See also:absence of the mandibular pulp. As in most Isopods, the See also:body is flattened, and consists of a See also:head, seven thoracic segments which are always See also:free, and six abdominal segments which may be free or fused. The " telson " is not separated from the Iast abdominal segment.

The head bears a pair of sessile See also:

compound eyes as well as the See also:minute antennules and the longer antennae. Each of the seven thoracic segments carries a pair of walking legs. The appendages of the See also:abdomen (with the exception of the last pair) are See also:flat membranous plates and serve as See also:organs of respiration. In many cases their See also:outer branches have small cavities opening to the outside by slit-like apertures, and giving rise internally to a See also:system of ramifying tubules filled with air. From their similarity to the air tubes or tracheae of See also:insects and other air-breathing Arthropods these tubules are known as " pseudo-tracheae." The See also:female wood-louse carries her eggs, after they are extruded from the body, in a pouch or " marsupium " which covers the under See also:surface of the See also:thorax and is formed by overlapping plates attached to the bases of the first five pairs of legs. The See also:young, on leaving this pouch, are like See also:miniature adults except that they are without the last pair of legs. Like all See also:Arthropoda, they See also:cast their skin frequently during growth. As a See also:rule the skin of the hinder See also:half of the body is moulted some days before that of the front half, so that individuals in See also:process of moulting have a very See also:peculiar See also:appearance. Some twenty-four See also:species of wood-lice occur in the See also:British Islands. Some, like the very See also:common slaty-See also:blue Porcellio scaber, are practically See also:cosmopolitan in their See also:distribution, having been transported, probably by the uncon- scious agency of See also:man, to nearly all parts of the globe. Equally common is the See also:brown, yellow-spotted Oniscus asellus. Armadillidium vulgare belongs to a See also:group which have the See also:power of See also:rolling themselves up into a See also:ball when touched and resembles the See also:millipede Glomeris.

It was formerly employed in popular See also:

medicine as a ready-made pill. The largest British species is Ligia oceanica, which frequents the See also:sea-See also:shore, just above high- See also:water See also:mark. In many points of structure, Common Vi ood-louse, for instance in the See also:long, many-jointed Oniscus asellus. antennae, it is intermediate, as' it is in habits, between the truly terrestrial forms and their marine See also:allies. Finally, one of the most interesting species is the little, See also:blind, and colourless Platyarthrus hoffmannseggi, which lives as a See also:guest or commensal in the nests of ants. (W. T.

End of Article: WOOD GREEN

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