Figure 180.—Adz, Type II, subtype a with posterior median ridge (L. 2029):

a, front; surface not ground, irregular owing to coarse chipping of sides, measurements of width taken between widest parts (back edges): b, back; median ridge distinct but diverging to side on butt; bevel, chipped and retouched at cutting edge, triangular shape, ready for grinding; poll, chipped from front and back resulting in curved edge; c, side; surface, narrow; back edges, distinct; back surface projects well back to median ridge; d, sections; upper section shows posterior ridge to right of middle line; lower section shows marked outward slope of sides and distinct median ridge.