change in aspect cast doubt on

marine character of, [113], [114];

change in, considered seasonal, [115], [120], [127], [163], [164];

marine character lost, [30], [115-118], [163], [164];

vegetation tracts, [119-127], [163], [164], [168], [169], [170];

below level of surrounding surface, [130], [164];

former ocean basins, [120], [129], [131];

latitudinal development in, [123], [124], [126], [127].

Dawes, [21], [23], [249], [250], [268].

Day, Martian, length of, [34], [160], [166].