Kenworthy and Edidin Vol. 142, No. 1, July 13, 1998. Pages 69–84.

Some of the revisions made to the above-mentioned article in proof did not appear in the final print version. The corrections are as follows:

p. 71, second column:

• In the last full paragraph, the reference in the fourth line should read “Kenworthy and Edidin, 1998.”

p. 74, first column:

• In the fourth line from the end of the first paragraph, “Table 1, Fig. 1, 2” should read “Table 1, Figs. A1 and A2.”

• In the second sentence of the second full paragraph, “when” should be deleted and “cells” capitalized.

• In the fourth line from the bottom of the third full paragraph, “Fig. 2” should read “Fig. A2.”

• In the third line from the bottom of the last paragraph, “Fig. 2” should read “Fig. A2.”

p. 75, second column:

• In the third line of the section subheading, “Donor” should read “Donors.”

p. 76, second column:

• In the second line from the top, “Fig. 3 c” should read “Fig. A3 c.”

p. 79, second column:

• In the second line from the bottom, “Fig. 3” should read “Fig. A3.”