e de- velopment. In birds, too, such deformities are not uncom- mon ; and our engraving shows two remarkable instances. particles of the photosphere are driven towards the center of the spots, where they dissolve and cease to be luminous. They are often seen suspended at different heights in the… … cessity for it ; forthe bird uses its beak simply to dig for 30° of latitude. worms in soft earth, and the prolongment was formed en- tirely of a species of horn. In caged birds, such formations can be accounted for, as the captives do not employ thcir bills as they do in their native state.…
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