Smithsonian miscellaneous collections . 3- Transverse section of a secondary quill of Coluntba hvia from the outer margin of the proximalleather vane. Magnified i:6oo 4. Transverse section of a secondary quill of Capriniulgus europceus, from the middle ot theproximal feather vane. Magnified i :6oo SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 43, t .^ ,^ ^ , i^^• >: -f^ ^ « 4_ k ^- ^ ^ -• \ St \ y -? SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 48, PL. IV

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Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience