Besides the hills above described, there are many smaller ones scattered at intervals over the great sandy plain of Selaia, but the only others calling for special notice are the three very remarkable white conical hills called =Marwot Elemikan=, situated twelve kilometres east of Abu Derega. These hills, though small, are conspicuous from considerable distances, owing to the dazzling appearance of the pure milk-white quartz of which they are composed. The highest and most northerly one, with a triangulation beacon on its summit, rises to 648 metres above sea, or 68 metres above the plain, in latitude 23° 54′ 14″, longitude 35° 6′ 8″. The other two lie about two kilometres south-east and south respectively, with a black hill mid-way between them. =The Um Gunud — Dahanib — Batoga Group.= The mountains of this group, occupying the country east of the watershed between Wadi Lahami and Wadi Khoda, are considerably lower than those of the preceding two groups, only a few peaks rising more than 1,000 metres above sea. The north portion of the group is formed by the line of mountain ridges which as seen from the sea near Berenice appears to connect Gebel Kalalat with Abu Gurdi, while the south part spreads further east and west and contains the highest peaks. =Gebel Um Gunud= is the northernmost mountain of the range west of Berenice. It is a dark rugged ridge, surmounted by a cairn[108] 989 metres above sea-level, forming the east side of the Wadi Lahami opposite Gebel Abu Gurdi. It is drained from the west by the Wadi Um Gunud, a feeder of Wadi Lahami, and on the east by feeders of Wadi Naait. Gullies in the west flanks of the mountain contain rock basins, called Galt Um Gunud, which hold water supplies for a long time after rain has fallen, and which are fairly easy of access from Wadi Lahami. Gebel Eidab, the next member of the range to the south, rises to 848 metres above sea. It is drained on the west by the Wadi Eidab, a tributary of Wadi Lahami, and on the east by the Wadi Abu Daba, a tributary of Wadi Mukhit; a rough and steep pass is said to exist from east to west between the heads of these two wadis near the mountain.