All over the island of Sardinia, side by side with the _nurhags_, rise tombs to which have been given the name of _Sepolture dei Giganti_. They are from thirty-two to thirty-nine feet long by a nearly equal width, and are built, some of huge slabs of stone, some of stones of smaller size. They are in every case surmounted by a pediment, formed of a single block, and often covered with sculptures dating from different epochs. These sepulchres are certainly of later date than the _nurhags_, and in them have been found numerous implements of bronze, but none of stone. [Illustration: 54.] “Talayoti” at Trepuco (Minorca). The _talayoti_, of which one hundred and fifty are still standing in the island of Minorca, are circular or elliptical truncated cones, built of huge unhewn stones, laid one on the other without cement (Fig. 54). The most remarkable of all of them, that at Torello, near Mahon, is thirty-three feet high. In many cases there are two stone, one placed upright, the other across it, in front of the _talayoti_. The meaning of these biliths is unknown. Yet another series of cyclopean monuments are known under the name of _nanetas_, and are not unlike overturned boats. Seven such _nanetas_ are still to be seen in the Balearic Isles. The one which is best preserved consists of large unhewn stones of rectangular shape, enclosing an inner chamber about six feet in width. The roof having fallen in, its height cannot be exactly determined; we only know that the lateral walls are some forty-five feet high. In Algeria also have been preserved some towers built of stones without cement. Some of them are square (_basina_) and surmounted by a small dolmen, others are round (_chouchet_) and closed at the top by a large slab of stone, as in the _nurhags_ we have just described. It is difficult to bring this account to a close without mentioning the _truddhi_ and the _specchie_ of Otranto.25 A _ truddhi _ is a massive conical tower consisting of a heap of scarcely hewn stones piled up without cement and with an exterior facing. Inside is a round room, the roof of which is formed by a series of circular courses of stone projecting one beyond the other. Sometimes a second chamber rises above the first, which _is_ reached by steps cut in the facing, which steps also lead to the platform on the top of the tower. Thousands of _truddhi_ are to be seen in Italy; they date from every epoch, and the people of Lecce and Bari continue to erect them as did their fathers before them. Side by side with the _truddhi_ rise the _specchie_, which are conical masses of stone, of greater height and probably of more ancient date than the towers. Lenormant thinks they were used to live in; but his opinion has been much questioned, and it is necessary to speak on this point with great reserve.