Sky and velocity distribution of galaxies in the clusters A2877, A2877b, and A160. Circles represent cluster members with measured photometry and widths; if unfilled, widths are poorly determined. For A2877b, triangles identify cluster members. Asterisks identify foreground and background galaxies, and dots show the location of galaxies with known redshift but lacking accurate width and/or photometry. Squares indicate outlines of imaged fields with the 0.9 m telescopes. Vertical dashed lines in the lower panels indicate 1R_A (and 2R_A for A160); a dotted line is used for A2877b. The top panels contain circles of radius 1R_A (and 2R_A for A160).