British 13 Somaliland] SURFACE Its crest is a line of jagged peaks, from which the ridge descends precipitously in numerous spurs towards the north coast, and more gently towards the south , where it merges into the limestone plateau. In the east the slopes are somewhat steep, while in the west they are easy . The upper part of the ridge is bare ; lower down , it is wooded and intersected with rich pasture lands. It forms the water -parting of the eastern half of the island, and numerous perennial streams descend from it. On the north side there are three main streams, all flowing in deep channels. Of these the Wadi Dilal, the most westerly, enters the Bay of Tamarida, while the Wadi Iheli and the Wadi Diberni reach the sea farther east .

The limestone plateau covers all the rest of the island except three points in the west and one in the east, where there are outcrops of granitic rock and narrow belts of chalk formation . It has an undulating surface, several of the slopes, such as Jebel Shaab in the west and Jebel Muni and Jebel Felink in the east, rising 1,000 ft . or more above the neighbouring surface. Moreover, it is cut up by a complicated system of narrow ravines with steep sides. Its eastern part is traversed by the perennial streams descending the southern slopes of Mount Haghier. Of these the most important, named from east to west, are the western branch of the Wadi Felink , the Wadi Arkas, the Wadi Faierho, the Wadi Aserho, and the Wadi Dihazhaz, all flowing in wide fertile valleys. East of these lies the eastern branch of the Wadi Felink, and west of them the Wadi Irek , a long watercourse, both of which flow through limestone country and are not perennial. West of the Wadi Irek , in the western half of the island, the water-parting lies near the south coast, and one main watercourse, the Wadi Ried, with numerous branches, drains the whole country to the