Lines 4 and 5, page 31 of Volume 19 should read: "and it is not more likely that ml-d is located on chromosome 5 than on any of the other barley chromosomes."
The last two lines in the footnote on page 66 of volume 19 should read:
"series, based on the gene symbol Zeo and the name zeocrithon, be established for the dominant dense spike mutants."