ion of peas for seed, ii. 199-200;
on _Opuntia leucotricha_, ii. 286;
reversion by the terminal pea in the pod, ii. 347.
MASTIFF, sculptured on an Assyrian monument, i. 17, ii. 429;
Tibetan, i. 35-36, ii. 278.
MATTHEWS, Patrick, on forest trees, ii. 237.
_Matthiola annua_, i. 399, ii. 20.
_Matthiola incana_, i. 381, 399.
MAUCHAMP, merino sheep, i. 100.
MAUDUYT, crossing of wolves and dogs in the Pyrenees, i. 24.
MAUND, Mr. crossed varieties of wheat, ii. 130.
MAUPERTUIS, axiom of "least action," i. 12.
MAURITIUS, importation of goats into, i. 101.
MAW, G., correlation of contracted leaves and flowers in pelargoniums,
ii. 330, 331.
MAWZ, fertility of _Brassica rapa_, ii. 165.
_Maxillaria_, self-fertilised capsules of, ii. 134;
number of seeds in, ii. 379.
_Maxillaria atro-rubens_, fertilisation of, by _M. squalens_, ii. 133.
MAYES, M., self-impotence in _Amaryllis_, ii. 139.
MECKEL, on the number of digits, ii. 13;
correlation of abnormal muscles in the leg and arm, ii. 322.
MEDUSAE, development of, ii. 368, 384.
MEEHAN, Mr., comparison of European and American trees, ii. 281.
_Meleagris mexicana_, i. 292.
_Meles taxus_, ii. 151.
MELONS, i. 359-360;
mongrel, supposed to be produced from a twin-seed, i. 391;
crossing of varieties of, i. 399, ii. 108, 129;
inferiority of, in Roman times, ii. 216;
changes in, by culture and climate, ii. 275;
serpent, correlation of variations in, ii. 330;
analogous variations in, ii. 349.
MEMBRANES, false, ii. 294-295.
MENETRIES, on the stomach of _Strix grallaria_, ii. 302.
MENINGITIS, tubercular, inherited, ii. 78.
METAGENESIS, ii. 366.
METAMORPHOSIS, ii. 366.
METAMORPHOSIS and development, ii. 388, 389.
METZGER, on the supposed species of wheat, i. 312-313;
tendency of wheat to vary, i. 315;
variation of maize, i. 321-322;
cultivation of American maize in Europe, i. 322, ii. 347;
on cabbages, i. 323-325;
acclimatisation of Spanish wheat in Germany, ii. 26;
advantage of change of soil to plants, ii. 146;
on rye, ii. 254;
cultivation of different kinds of wheat, ii. 261.
MEXICO, dog from, with tan spots on the eyes, i. 29;
colours of feral horses in, i. 61.
MEYEN, on sending of bananas, ii. 168.
MICE, grey and white, colours of, not blended by crossing, ii. 92;
rejection of bitter almonds by, ii. 232;
naked, ii. 279.
MI