Spaniels, in India, i. 38;
King Charles's, i. 41;
degeneration of, caused by interbreeding, ii. [121].
Spanish fowls, i. 227, 250, 253;
figured, i. 226;
early development of sexual characters in, i. 250, 251;
furcula of, figured, i. 268.
Species, difficulty of distinguishing from varieties, i. 4;
conversion of varieties into, i. 5;