Smithsonian miscellaneous collections . --> ^ 17. 18, 19. Surface views of the upper side of a hand remex of Cypselus (i/«j-,.focussed at three dif-ferent levels. Magnified 1:270 17 Highest level showing the terminal threads of the hook-fibers 18. Middle level showing the proximal portions of the houk-fibers SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 48, PL. X.

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Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience