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are roofed with slabs of rock of sufficient length to span the side walls, showing that no particular care had been exercised to form close joints. Over this stone ceiling the earth was piled in mound-shape, reaching a depth in the center of from 4 to 6 feet, and covered by a sod that afforded ample protection from rain. The floors were the bare earth, and the interiors were damp and moldy from insufficient ventilation afforded by the single contracted opening.
   An accurate measurement of these remarkable structures gave the average height from floor to ceiling 4 feet 6 inches; thickness of walls, 4 feet to 10 inches; width of rooms, 4 feet 6 inches; length of rooms, 12 feet 9 inches; average size of door-ways, height 20 inches, width 19 inches. In making the survey of Orongo the houses were

numbered from 1 to 49, inclusive, commencing at the inshore extremity (Fig. 6). While in the majority of instances the interior dimensions were considerably below the average given above, several of the houses exceeded those limits, particularly in the length of the rooms. The

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