Figure 214.—Broken triangular chisel, median ridge in front (C. 345):

a, front; two sides well ground with median ridge ground to a narrow surface which expands below; b, back; wide surface, chipped, sharply defined back edges, bevel broken off; c, side; ground narrowing towards lower end; d, sections; upper section shows roughly triangular with front median ridge slightly ground down, back irregular; lower section shows expansion of narrow front surface.