Devil-crab.
Devonian, fossil-insect from the.
Dewlaps, of Cattle and antelopes.
Diadema, sexual differences of colouring in the species of.
Diamond-beetles, bright colours of.
Diastema, occurrence of, in man.
Diastylidae, proportion of the sexes in.
Dicrurus, racket-shaped feathers in; nidification of.
Dicrurus macrocercus, change of plumage in.
Didelphis opossum, sexual difference in the colour of.