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Encyclopedia Britannica - Main :: GUI-HAN |
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GUINEA FOWL , a well-known domestic gallinaceous bird, so called from the country whence in modern times it was brought to Europe, the Meleagris and Avis or Gallina Numidica of ancient authors.' Little is positively known of the wild stock to which we owe our tame birds, nor can the period of its re-introduction (for there is apparently no evidence of its domestication being continuous from the time of the Romans) be assigned more than roughly to that of the African discoveries of the Portuguese. It does not seem to have been commonly known till the middle of the 16th century, when John Caius sent a description and figure, with the name Gallus Mauritanus, to Gesner, who published both in his Paralipomena in 1555, and in the same year Belon also gave a notice and woodcut under the name of Poulle de la Guinee; but while the former authors properly referred their bird to the ancient Meleagris, the latter confounded the Meleagris and the turkey. The ordinary guinea
chief
appearance are a tendency to albinism generally shown in the plumage of its lower parts, and frequently, though not always, the conversion of the colour of its legs and',Columella (De re rustica, viii. cap. 2) distinguishes the Meleagels from the Gallina Africana or Numidica, the latter having, he says, a red wattle (palea, a reading obviously preferable to galea), while it was blue in the former. This would look as if the Meleagris had sprung from what is now called Numida ptilorhyncha, while the Gallina Africana originated in the N. meleagris, species which have a different 'range, and if so the fact would point to two distinct introductionsone by Greeks. the other by Latins.feet from dark greyish-brown to bright orange. That the home of this species is West Africa from the Gambia 2 to the Gaboon is certain, but its range in the interior is quite unknown. It appears to have been imported early into the Cape Verd Islands, where, as also in some of the Greater Antilles and in Ascension, it has run wild. Representing the species in South
bright blue in its plumage, the hackles that adorn the lower part of its neck, and its long tail. By some writers it is thought to form a separate genus, Acryllium. All these guinea
helmet ," but there is another group (to which the name Guttera has been given) in which a thick tuft of feathers ornaments the top of the head. This contains four or five species, all inhabiting some part or other of Africa, the best known being the N. cristata from Sierra Leone and other places on the western coast. This bird, apparently mentioned by Marcgrave more than 200 years ago, but first described by Pallas, is remark-able for the structureunique, if not possessed by its representative formsof its furcula, where the head, instead of being the thin plate
helmet , are two very rare forms, Agelastes and Phasidus, both from western Africa. Of their habits nothing is known. All these birds are beautifully figured in Elliot's Monograph of the Phasianidae, from drawings byWolf. (A. N.) GUINEA-WORM (Dracontiasis), a disease due to the Filaria medinensis, or Dracunculus, or Guinea-worm, a filarious nematode like a horse- hair , whose most frequent habitat is the subcutaneous and intramuscular tissues of the legs and feet. It is common on the Guinea coast, and in many other tropical and subtropical regions and has been familiarly known since ancient times. The condition of dracontiasis due to it is a very common one, and sometimes amounts to an epidemic. The black races are most liable, but Europeans of almost any social rank and of either sex are not altogether exempt. The worm lives in water, and, like the Filaria sanguinis honinis, appears to have an intermediate host for its larval stage. It is doubtful whether the worm penetrates the skin of the legs directly; it is not impossible that the intermediate host (a cyclops) which contains the larvae may be swallowed with the water, and that the larvae of the Dracunculus may be set free in the course of digestion.End of Article: GUINEA FOWL If you wish, you can link directly to this article.
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