Figure 187.—Adz, Type IV, subtype a, reverse quadrangular (L. 2186):

a, front, surface well ground but slight hollows left near edges, narrows towards poll; broken off; b, back, surface narrow, well ground except for hollow towards poll; back edges, distinct but irregular on left owing to uneven chipping; side surfaces show up owing to marked inward slope of sides; bevel well ground with arched chin, irregular chipped poll surface; c, side fairly well ground but all hollows not removed; d, sections; top shows transverse convexity of sides, middle section shows different slope of the two sides.