Ricinus, annual in England, ii. [305].
Riedel, on the "Bagadotte" pigeon, i. 141;
on the Jacobin pigeon, i. 154;
fertility of hybrid pigeons, i. 192.
Rinderpest, ii. [378].
Risso, on varieties of the orange, i. 336, ii. [308], [331].
Rivers, Lord, on the selection of greyhounds, ii. [235].
Rivers, Mr., persistency of characters in seedling potatoes, i. 331;
on the peach, i. 338, 339;
persistency of races in the peach and nectarine, i. 339, 340;