Intermediates, [125]

Johannsen, W., [160]

Lop-eared rabbits, [132]

Mendel, [8], [17], [26], [132]

Mental characters, [180]

Mice, inheritance of coat colour in, [50]

Mimicry, [143]

Mirabilis, [151]

Morgan, T. H., [116]

Mulattos, [129]