on crossing cattle, ii. [118];
individual sterility, ii. [162].
Spores, reproduction of abnormal forms by, i. 383.
Sports, i. 373; in pigeons, i. 213.
Spot pigeon, i. 156, 207.
Sprengel, C. K., on dichogamous plants, ii. [90];
on the hollyhock, ii. [107];
on the functions of flowers, ii. [175].
Sproule, Mr., inheritance of cleft-palate and hare-lip, ii. [24].
Spurs, of fowls, i. 255;