+-----------------+------+------+-------+-------+ | Zygotic |White.|Buff. |Buff + | Game. | | formula. | | |black. | | +-----------------+------+------+-------+-------+ | C2J2X2 | .. | .. | 1 | .. | | C2J2Xx | .. | .. | 2 | .. | | C2J2x2 | .. | .. | .. | 1 | | C2JjX2 | .. | .. | 2 | .. | | C2JjXx | .. | .. | 4 | .. | | C2Jjx2 | .. | .. | .. | 2 | | C2j2X2 | .. | 1 | .. | .. | | C2j2Xx | .. | 2 | .. | .. | | C2j2x2 | 1 | .. | .. | .. | | CcJ2X2 | .. | .. | 2 | .. | | CcJ2Xx | .. | .. | 4 | .. | | CcJ2x2 | .. | .. | .. | 2 | | CcJjX2 | .. | .. | 4 | .. | | CcJjXx | .. | .. | 8 | .. | | CcJjx2 | .. | .. | .. | 4 | | Ccj2x2 | .. | 2 | .. | .. | | Ccj2Xx | .. | 4 | .. | .. | | Ccj2x2 | 2 | .. | .. | .. | | c2-- | 16 | .. | .. | .. | | +------+------+-------+-------+ | Total | 19 | 9 | 27 | 9 | +-----------------+------+------+-------+-------+ The classification here employed can not be used in detail in comparing observed results with expectation, for the distinction between buff and buff-and-black appears only in chicks that have acquired the permanent plumage. Consequently it will be found necessary to combine these two classes into one and then make the comparison--as is done in table 62. TABLE 62.--_Distribution of colors, combined classes._ +-------------------+-----------+--------------------------+ | Color. | In 64, | In the actual | | |calculated.| 58 individuals. | | | +--------------+-----------+ | | | Calculated. | Observed. | +-------------------+-----------+--------------+-----------+ | Buff (and black).| 36 | 33 | 34 | | White. | 19 | 17 | 17 | | Game. | 9 | 8 | 7 | | +-----------+--------------+-----------+ | Total. | 64 | 58 | 58 | +-------------------+-----------+--------------+-----------+ The correspondence is certainly close. The hypothesis of factors thus receives additional support and the variability of the offspring in the second hybrid generation is sufficiently explained. 4. WHITE LEGHORN × BLACK MINORCA.