production of mules among the Romans, ii. [110].
Dusicyon sylvestris, i. 23.
Dutch rabbit, i. 107.
Dutch roller pigeon, i. 151.
Dutrochet, pelorism in the laburnum, ii. [346].
Duval, growth of pears in woods in France, ii. [260].
Duval-Jouve, on Leersia oryzoides, ii. [91].
Duvernoy, self-impotence in Lilium candidum, ii. [137].
Dzierzon, variability in the characters and habits of bees, i. 298.