SOLOMON, his stud of horses.
SOMERVILLE, Lord, on the fleece of Merino sheep. -on crossing sheep. -on selection of sheep. -diminished fertility of Merino sheep brought from Spain.
SOOTY fowls.
Sorghum.
SOTO, FERDINAND DE, on the cultivation of native plants in Florida.
SPAIN, hawthorn monogynous in.
SPALLANZANI, on feral rabbits in Lipari. -experiments on salamanders. -experiments in feeding a pigeon with meat.
SPANIELS, in India. -King Charles's. -degeneration of, caused by interbreeding.
SPANISH fowls. -figured. -early development of sexual characters in. -furculum of, figured.
SPECIES, difficulty of distinguishing from varieties. -conversion of varieties into. -origin of, by natural selection. -by mutual sterility of varieties.