illustrations of, ii. [421]-[428].

Selection, sexual, ii. [75].

Self-impotence in plants, ii. [131]-[140];

in individual plants, ii. [136]-[138];

of hybrids, ii. [174].

Selwyn, Mr., on the Dingo, i. 26.

Selys-Longchamps, on hybrid ducks, i. 190, ii. [46], [157];

hybrid of the hook-billed duck and Egyptian goose, i. 282.

Seringe, on the St. Valery apple, i. 350.

Serpent Melon, i. 360.