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MANATI (often anglicized as "manatee")

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Originally appearing in Volume V17, Page 542 of the 1911 Encyclopedia Britannica.
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MANATI (often anglicized as "manatee") , the name, adapted from the Carib manattouf, given by the See also:Spanish colonists of the See also:West Indies to the See also:American representative of a small See also:group of herbivorous aquatic mammals, constituting, with their See also:allies the See also:dugong and the now See also:extinct See also:Rhytina, the See also:order Sirenia. The name, though possibly of See also:Mandingo origin (see MANDINGO), was latinized as manatus, furnished with hands, thus referring the See also:etymology to the somewhat See also:hand-like See also:form, or hand-like use, of the fore-flippers, which alone serve these creatures for limbs. 1blanatis, as shown in the See also:illustration in the See also:article SIRENIA, are somewhat See also:whale-like in shape, having a similar horizontally See also:expanded tail-fin; but here the resemblance to the See also:Cetacea ceases, the whole organization of these animals being constructed on entirely different lines. The American manati, Manatus (or, as some would have it, Trichechus latirostris), inhabits the See also:rivers of See also:Florida, See also:Mexico, Central See also:America and the West Indies, and (From Murie.) Front view of See also:head of American Manati, showing the eyes, nostrils, and mouth. A, with the lobes of the upper See also:lip divaricated; B, with the lip contracted. See also:measures from 9 to 13 feet in length. The See also:body is somewhat See also:fish-like, but depressed and ending posteriorly in a broad, See also:flat, See also:shovel-like See also:horizontal tail, with rounded edges. The head is of moderate See also:size, oblong, with a See also:blunt, truncated muzzle, and divided from the body by a slight constriction or See also:neck. The fore limbs are flattened See also:oval paddles, placed rather See also:low on the sides of the body, and showing externally no signs of See also:division into fingers, but with three diminutive flat nails near their extremities. No traces of See also:hind limbs are discernible either externally or internally; and there is no dorsal fin. The mouth is See also:peculiar, the tumid upper lip being cleft in the See also:middle See also:line into two lobes, each of which is separately movable. The nostrils are two semilunar See also:valve-like slits at the See also:apex of the muzzle.

The eyes are very See also:

minute, placed at the sides of the head, and with a nearly circular See also:aperture with wrinkled margins; and See also:external ears are wanting. The skin generally is of a dark greyish See also:colour, not smooth or glistening like that of whale or See also:dolphin, but finely wrinkled. At a little distance it appears naked, but See also:close inspection, at all events in See also:young animals, shows a scanty covering of delicate hairs, and both upper and under lips are supplied with See also:short, stiff bristles. Manatis have a number—as many as 20 pairs in each See also:jaw—of two-ridged See also:teeth, of which, however, but comparatively few are in use at once. They lack the large tusks of the male dugong, and the fore See also:part of the See also:skull is not so much See also:bent down as in that See also:animal. In See also:life the See also:palate has a horny See also:plate, with a similar one in the See also:lower jaw. The See also:skeleton is described under SIRENIA. Manatis pass their life in the See also:water, inhabiting bays, lagoons, estuaries and large rivers, but the open See also:sea is unsuited to their peculiar mode of life. As a See also:rule they prefer shallow water, in which, when not feeding, they See also:lie near the bottom. In deeper water they often See also:float, with the body much arched, the rounded back close to the See also:surface, and the head, limbs and tail See also:hanging downwards. The See also:air in the lungs assists them to maintain this position. Their See also:food consists exclusively of aquatic See also:plants, on which they feed beneath the water.

They are slow in their movements, and perfectly harmless, but are subject to persecution for the See also:

sake of their oil, skin and flesh. Frequent attempts have been made to keep specimens alive in captivity, and some-times with considerable success, one having lived in the See also:Brighton See also:Aquarium for upwards of sixteen months. From such See also:captive specimens certain observations on the mode of life of these animals have been made. We learn, for instance, that from the See also:shoulder-See also:joint the flippers can be moved in all directions, and the See also:elbow and See also:wrist permit of See also:free See also:extension and flexion. In feeding, manatis push the food towards their mouths by means of one of the hands, or both used simultaneously, and any one who has seen these members thus employed can believe the stories of their carrying their young under their arms. Still more interesting is the See also:action of the peculiar lateral pads formed by the divided upper lip, thus described by See also:Professor A. Garrod: " These pads have the See also:power of transversely approaching towards and receding from one another simultaneously (see fig.). When the animal is on the point of seizing (say) a See also:leaf of See also:lettuce, the pads are div erged transversely in such a way as to make a median See also:gap of considerable breadth. Directly the leaf is within grasp the lip .pads are approximated, the leaf is firmly seized between their contiguous bristly surfaces, and then See also:drawn inwards by a backwa rd See also:movement of the lower margin of the lip as a whole." The animal is thus enabled by the unaided means of the upper lip to introduce food placed before it without the assistance of the comparatively insignificant lower lip, the action recalling that of the mouth of the silkworm and other caterpillars in which the mandibles diverge and converge laterally during mastication. All trustworthy observations indicate that the manati has not the power of voluntarily leaving the water. None of the specimens in confinement has been observed to emit any See also:sound. The Amazonian manati (M. inunguis) is a much smaller See also:species, not exceeding 7 or 8 ft. in length, and without nails to the flippers.

It ascends most of the tributaries of the See also:

Amazon until stopped by rapids. From a specimen which lived a short See also:time'in See also:London it appears that the lip-pads are less See also:developed than in the See also:northern species. The third species is the West See also:African M. senegalensis, which extends a distance of about ten degrees See also:south and sixteen See also:north of the See also:equator, and ranges into the See also:heart of the See also:continent as far as See also:Lake Tchad. From 8 to to ft. appears to be the normal length; the See also:weight of a specimen was 590 lb. The colour is bluish See also:black, with a tinge of See also:olive-See also:green above and yellow below. (R.

End of Article: MANATI (often anglicized as "manatee")

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