. Zoology of Egypt. ght of cold air from thenorth during the greater part of the year, so that winds from that quarter are six timesmore prevalent than those from the south. In March to May the hot khamsin chargedwith dust blows sometimes for days at a time, while the sun is above the horizon,drying up vegetation and exhausting animal life. The great triangular level alluvial expanse of the Delta of the Nile is enclosed on itseastern and western sides respectively by the Arabian and Libyan deserts. Nearly thewhole of the seaward face of the Delta is occupied by a series of great lakes and swam
. Zoology of Egypt. ght of cold air from thenorth during the greater part of the year, so that winds from that quarter are six timesmore prevalent than those from the south. In March to May the hot khamsin chargedwith dust blows sometimes for days at a time, while the sun is above the horizon,drying up vegetation and exhausting animal life. The great triangular level alluvial expanse of the Delta of the Nile is enclosed on itseastern and western sides respectively by the Arabian and Libyan deserts. Nearly thewhole of the seaward face of the Delta is occupied by a series of great lakes and swampsof brackish and even saline waters, surrounded more or less by sedgy banks. Theseextensive lakes are separated from the sea by sand-dunes, generally resting on a solidreef, made up of sea and freshwater shells, which forms a barrier against the encroach- 1 The elephant is unmistakably represented in Roman mosaics, Ac, iD Tunisia. Johnston, P. Z. S. 189S,p. 353. REPTILES AND BATRACHIANS OF EGYPT. Introd. Plate No. i.—Escarpment of desert plateau at Abu Roash. Alt. about 183 metresabove Nile. No. 2.—Desert plateau, behind Gizeh. looking south-west. Alt. about 76metres above Nile. No. 3.—Outcrop of limestone desert, behind Gizeh, looking eastward acrossNile to Mokattam hills. Alt. about 122 metres above Nile. !W from top of escarprracross Nile valley tabove Nile. the of desert plateau above Naquada, lookingdesert. Alt. about 365 metres No. 5.—View from top of plateau above Naquada. looking westward down avalley of the Alt. about 426 metres above Nile. No. 6.—View through cleft from top of plateau above Naquada, looking intoNile valley. Alt. about 426 metres above Nile. PHYSICAL FEATURES. xlvit ments of the Mediterranean. In the neighbourhood of these lakes, between the twodeserts, is a tract of land lying almost at the level of their waters and covered with alow scrubby vegetation. To the west of Lake Maryut low, rounded, detached ranges ofhills extend t
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