Figure 2 illustrates “ideal” scraper-plane types and the following description is a brief summary of the recognized forms. (For photographs, see Treganza and Malamud, 1950, pls. 17-19.)
Type IA
Round to oval in outline, flat base chipped about the entire perimeter. Top surface flaked to a near symmetrical dome shape.
Type IB
Like IA, except that the upper surface rises to a peak or ridge somewhat off-center.
Type IC
Like IA, but higher and with more latitude in form. Flakes are struck from the perimeter at a steep angle so that on most specimens height exceeds diameter.
Type IIA
Form is variable, but tends toward subrectangular. About three-quarters of the basal margin evidences flaking, the remaining portion consists of an unretouched straight edge caused by the removal of a large primary flake.
Type IIB