Page 5, second line of fourth paragrph, in two places, for "minature" read "miniature."
Page 7, first line of third paragraph, for "H. F. Butler" read "L. Butler."
Page 12, seventh line of third paragraph, for "R-er rr" read "R- or rr."
Page 13, last line in table, for "L. hirsutum" read "L. hirsutum."
Page 16, line 16, for "Paolmar" read "Palomar."
Page 16, tenth line from bottom, for "hubrid" read "hybrid."
Page 20, eleventh line from bottom, for "metant" read "mutant."