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Rh The length of the animal when full grown is from 18 to 20 in. from the extremity of the beak to the end of the tail, the male being slightly larger than the female. The fur is short, dense and rather soft to the touch, and composed of an extremely fine and close under-fur, and of longer hairs which project beyond this, each of which is very slender at the base, and expanded, flattened and glossy towards the free end. The general colour is deep brown, but paler on the under parts. The tail is short, broad and depressed, and covered with coarse hairs, which in old animals generally become worn off from the under

surface. There are no true teeth in the adult, although the young possess a set which are shed after being worn down by friction with food and sand, their purposes being afterward served by horny prominences, two on each side of each jaw—those in the front narrow, longitudinal, sharp-edged ridges, and those behind broad, flattened and molariform. The upper surface of the lateral edges of the mandible has also a number of parallel fine transverse ridges, like those on the bill of a duck. In the cheeks are tolerably capacious pouches, which appear to be used as receptacles for food.

The limbs are strong and short, each with Eve well-developed toes provided with strong claws. In the fore feet the web not only fills the inter spaces between the toes, but extends considerably beyond the ends of the long, broad and somewhat flattened nails, giving great expanse to the foot when used for swimming, though capable of being folded back on the palm when the animal is burrowing or walking on the land. On the hind foot the nails are long, curved and pointed, and the web extends only to their base. On the heel of the male is a strong, curved sharply pointed, movable horny spur, directed upwards and backwards, attached by its expanded base to the accessory bone of the tarsus. This spur, which attains the length of nearly an inch, is traversed by a minute canal, terminating in a fine longitudinal slit near the point, and connected at its base with the duct of a large gland situated at the back part of the thigh. The whole apparatus is so exactly analogous in structure to the poison-gland and tooth of a venomous snake as to suggest a similar function, and there is now evidence that it employs this organ as an offensive weapon.

The platypus is aquatic in its habits, passing most of its time in the water or close to the margin of lakes and streams, swimming and diving with the greatest ease, and forming for the purpose of sleeping and breeding deep burrows in the banks, which generally have two orifices, one just above the water level, concealed among long grass and leaves, and the other below the surface. The passage at first runs obliquely upwards in the bank, sometimes to a. distance of as much as 50 ft., and expands at its termination into a cavity, the floor of which is lined with dried grass and leaves, and in which, it is said, the eggs are laid and the young brought up. Their food consists of aquatic insects, small crustaceans and worms, which are caught under water, the sand and small stones at the bottom being turned over with their bills to find them. They appear at first to deposit what they have thus collected in their cheek pouches, and when these are filled they rise to the surface and quietly triturate their meal with the horny teeth before swallowing it. Swimming is effected chiefly by the action of the broad forepaws, the hind feet and tail taking little share in locomotion in the water. When asleep they roll themselves into a ball, as shown in the figure. In their native haunts they are extremely timid and wary, and very difficult to approach, being rarely seen out of their burrows in the daytime. Mr A. B. Crowther, who supplemented the often quoted observations of Dr George Bennett upon the habits of these animals in confinement, states: “They soon become very tame in captivity; in a few days the young ones appeared to recognize a call, swimming rapidly to the hand paddling the water; and it is curious to see their attempts to procure a worm enclosed in the hand, which they greedily take when offered to them. I have noticed that they appear to be able to smell whether or not a worm is contained in the closed hand to which they swim, for they desisted from their efforts if an empty fist was offered.”

 PLAUEN, a town of Germany, in the kingdom of Saxony, on the Weisse Elster, 60 m. south of Leipzig, on the railway to Hof and Munich and at the junction of lines to Eger and Gera. Pop. (1890), 47,007; (1900), 73,891; (1905), 105,383. It was formerly the capital of Vogtland, or Voigtland, a territory governed by the imperial vogt, or bailiff, and this name still clings in popular speech to the hilly district in which the town lies. Of its three Evangelical churches the most prominent is the fine Gothic church of St John, with twin spires, which was restored in 1886. Other buildings of note are the town hall, dating from about 1550, and the old castle of Hradschin, now used as a law court. Plauen is now the chief place in Germany for the manufacture of embroidered white goods of all kinds, for the finishing of woven cotton fabrics, known as Plauen goods, and for the making of lace.

Plauen was probably founded by the Slavs. First mentioned in 1122, it passed under the authority of Bohemia in 1327 and came to Saxony in 1466, remaining permanently united with the electorate since 1569. The manufacture of white goods was introduced by Swabian, or Swiss, immigrants about 1570. The advance in its material prosperity has been especially rapid since the incorporation of Saxony in the German Zollverein.

 PLAUTUS, TITUS MACCIUS (originally perhaps ; cf. Asin. Prol. 11), the great comic dramatist of ancient Rome, was born at Sarsina in Umbria according to the testimony of Festus, who calls him Umber Sarsinas, and Jerome. The date of his death was 184 (Cicero, Brutus, xv. 60). The date of his birth depends upon an inference based on the statement of Cicero (De senectute, xiv. 50) that he was an old man when he wrote his Truculentus and Pseudolus. The latter play was 