Leibnitz, [127], [217].

Leidy, [83].

Lessing, [405], [407].

Linnaeus, [30].

Livingstone, [93].

Lotze, [142], [145], [149].

Lubbock, Sir John, [18], [91], [93], [242].

Lyell, Sir Charles, [18], [36], [55], [89], [90], [222].

Mädler, [177], [252].

Malthus, [39].