Corvus corone.
Corvus graculus, red beak of.
Corvus pica, nuptial assembly of.
Corydalis cornutus, large jaws of the male.
Cosmetornis.
Cosmetornis vexillarius, elongation of wing-feathers in.
Cotingidae, sexual differences in; coloration of the sexes of; resemblance of the females of distinct species of.
Cottus scorpius, sexual differences in.
Coulter, Dr., on the Californian Indians.
Counting, origin of; limited power of, in primeval man.