marine, living in fresh water, ii. [304];
double monsters of, ii. [340].
Fission and gemmation, ii. [358].
Fitch, Mr., persistency of a variety of the pea, i. 329.
Fittest, survival of the, i. 6.
Fitzinger, origin of sheep, i. 94;
African maned sheep, i. 96.
Fixedness of character, conditions of, discussed, ii. [62]-[64].
Flax, found in the Swiss lake-dwellings, i. 317;
climatal difference in products of, ii. [274].