660 HENRY S. WASHINGTON 
Zeneti, the direction of the scarp face changing from north to east 
at the northwest angle of the lake. On the east are the rough 
masses of the Khagiar flow, and on the southeast and south the 
steep slopes of Costa del Bagno, evidently part of the original north 
flank of Montagna Grande, while at the southwest corner is the 
extremity of the Gelfiser flow. 
Basaltic area——The northwestern end of the island offers 
peculiar features of its own. In general the surface shows a fairly 
Fic. 3.—Lava Gelfiser, from Costa Zeneti 
uniform, gentle slope away from the central mass of Montagna 
Grande, the contour lines being roughly concentric about this. 
On this broad, low, conical base, which has a radial extent of about 
4 kilometers and a maximum altitude in the interior of about 200 
meters, there are several volcanic cones. These are of two distinct 
types—a pantelleritic and a basaltic. 
Of the former type is Monte Gelkhamar, whose summit, 289 
meters above sea-level, rises not more than too meters above the 
general slope on the east, but about 200 meters on the west. In 
form it is roughly circular, though somewhat irregular, and is 
