dun-coloured, origin of, i. 59;

colours of feral, i. 60-61;

effect of fecundation by a Quagga on the subsequent progeny of, i. 403-404;

inheritance of peculiarities in, ii. [10]-[11];

polydactylism in, ii. [14];

inheritance of colour in, ii. [21];

inheritance of exostoses in legs of, ii. [23];

reversion in, ii. [33], [41];

hybrids of, with ass and zebra, ii. [42];

prepotency of transmission in the sexes of, ii. [65];