Merriam, [18], [19], [379].

Mesozoic times of the earth, [135], [142], [144], [151].

Meteorology of Mars, [63], [93].

Moisture, [86], [154].

Monera, [349], [357];

suggestive of crystals, [356].

Months, Martian, different from our own, [36].

Mountains, not visible on Mars, [100];

measurement of, [97-100];

limit of height visible, [100];