——, on continuous succession of genera, [316].
——, on close alliance of fossils in consecutive formations, [335].
——, on embryological succession, [338].
Pierce, Mr., on varieties of wolves, [91].
Pigeons with feathered feet and skin between toes, [12].
——, breeds described, and origin of, [20].
——, breeds of, how produced, [39], [42].
——, tumbler, not being able to get out of egg, [87].
——, reverting to blue colour, [160].
——, instinct of tumbling, [214].