Dupont, M., on the occurrence of the supra-condyloid foramen in the humerus of man.
Durand, J.P., on causes of variation.
Dureau de la Malle, on the songs of birds; on the acquisition of an air by blackbirds.
Dutch, retention of their colour by the, in South Africa.
Duty, sense of.
Duvaucel, female Hylobates washing her young.
Dyaks, pride of, in mere homicide.
Dynastes, large size of males of.
Dynastini, stridulation of.
Dytiscus, dimorphism of females of; grooved elytra of the female.