reversion in fourth generation of, ii. [34];

of the Pacific Islands, ii. [87], [220], [303];

mongrel, ii. [92]-[93];

comparative facility of crossing different breeds of, ii. [102];

fertility of, ii. [111], [151];

inter-breeding of, ii. [120]-[121];

selection of, among the Greeks, ii. [202], [209];

among savages, ii. [206]-[207];

unconscious selection of, ii. [211]-[212];

valued by the Fuegians, ii. [215];