Maedler, [21], [23], [26], [109].
Mammal, [349].
Maps, of Mars, [20-24], [26-29].
Mare Acidalium, [115], [242], [246-252];
white in, [80];
darker than the Mare Erythraeum, [127].
Mare Cimmerium, [267].
Mare Erythraeum, [113];
irregular lines in, [30];
in 1903, [122-124];