[12] Goodale, 1909, has shown that in Plymouth Rocks males may be and females usually are heterozygous in barring. There is thus a clear difference between the barring of the Cochin × Tosa hybrid and that of the Plymouth Rock. The question of the heterozygous nature of the female sex, fully discussed by Goodale, will be considered by me in another place. [Note at time of correcting proof.] (2) _White Leghorn Bantam × Dark Brahma._--This cross was referred to in my report of 1906. From the table given there it appears that I got 5 barred fowl in F1 out of a total of 51. In pen 701 I attempted to see if I could fix this barring. I used the best barred cock of the F2 generation and the best barred hens of F1 or F2. The result was as shown in table 66. TABLE 66.--_Distribution of color in F2 or F2 hybrids of the barred strain._ [ABBREVIATIONS: W.L. = White Leghorn; Dk.Br. = Dark Brahma.] +---------------------------------------+---------------------------------+----------------------------+ | Mother. | Father. | Offspring. | +------+----+-------------+-------------+------+----+-------------+-------+------+------+------+-------+ | | | | | | | | | | | Dark | | | No. |Gen.| Races. | Color. | No. |Gen.| Races. |Color. |White.|Black.| Brah.|Barred.| | | | | | | | | | | | | | +------+----+-------------+-------------+------+----+-------------+-------+------+------+------+-------+ | | | | | | | | | | | | | | 721 | F1 |W.L. × Dk.Br.|Dark barred | 1898 | F2 |W.L. × Dk.Br.|Barred.| .... | 5 | 7 | 5 | | 894 | F2 | Do. |Well barred | 1898 | F2 | Do. | Do. | .... | 9 | 3 | [A]10 | | 965 | F2 | Do. |Medium barred| 1898 | F2 | Do. | Do. | 2 | 16 | 4 | 8 | | 1335 | F2 | Do. |Dark barred | 1898 | F2 | Do. | Do. | 1 | 14 | 1 | 2 | | 1772 | F2 | Do. |Poorly barred| 1898 | F2 | Do. | Do. | .... | 4 | 7 | [B]5 | | 1915 | F2 | Do. |Fairly barred| 1898 | F2 | Do. | Do. | .... | 10 | 4 | 5 | | 2576 | F2 | Do. | Do. | 1898 | F2 | Do. | Do. | .... | 9 | 11 | 3 | | | | +------+------+------+-------+ | | | Totals (145) | 3 | 67 | 37 | 38 | | | | Percentages | 2.1 | 46.2 | 25.5 | 26.2 |